periplus: comparison toolkit/javascript/d3/d3.js

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toolkit/javascript/d3/d3.js

changeset 47

c0b4a8b5a012

equal deleted inserted replaced

-:efd9c589177a
+:c0b4a8b5a012
+(function(){if (!Date.now) Date.now = function() {
+return +new Date;
+};
+try {
+document.createElement("div").style.setProperty("opacity", 0, "");
+} catch (error) {
+var d3_style_prototype = CSSStyleDeclaration.prototype,
+d3_style_setProperty = d3_style_prototype.setProperty;
+d3_style_prototype.setProperty = function(name, value, priority) {
+d3_style_setProperty.call(this, name, value + "", priority);
+};
+}
+d3 = {version: "2.5.0"}; // semver
+var d3_array = d3_arraySlice; // conversion for NodeLists
+function d3_arrayCopy(pseudoarray) {
+var i = -1, n = pseudoarray.length, array = [];
+while (++i < n) array.push(pseudoarray[i]);
+return array;
+}
+function d3_arraySlice(pseudoarray) {
+return Array.prototype.slice.call(pseudoarray);
+}
+try {
+d3_array(document.documentElement.childNodes)[0].nodeType;
+} catch(e) {
+d3_array = d3_arrayCopy;
+}
+var d3_arraySubclass = [].__proto__?
+// Until ECMAScript supports array subclassing, prototype injection works well.
+function(array, prototype) {
+array.__proto__ = prototype;
+}:
+// And if your browser doesn't support __proto__, we'll use direct extension.
+function(array, prototype) {
+for (var property in prototype) array[property] = prototype[property];
+};
+function d3_this() {
+return this;
+}
+d3.functor = function(v) {
+return typeof v === "function" ? v : function() { return v; };
+};
+// A getter-setter method that preserves the appropriate `this` context.
+d3.rebind = function(object, method) {
+return function() {
+var x = method.apply(object, arguments);
+return arguments.length ? object : x;
+};
+};
+d3.ascending = function(a, b) {
+return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+};
+d3.descending = function(a, b) {
+return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+};
+d3.mean = function(array, f) {
+var n = array.length,
+a,
+m = 0,
+i = -1,
+j = 0;
+if (arguments.length === 1) {
+while (++i < n) if (d3_number(a = array[i])) m += (a - m) / ++j;
+} else {
+while (++i < n) if (d3_number(a = f.call(array, array[i], i))) m += (a - m) / ++j;
+}
+return j ? m : undefined;
+};
+d3.median = function(array, f) {
+if (arguments.length > 1) array = array.map(f);
+array = array.filter(d3_number);
+return array.length ? d3.quantile(array.sort(d3.ascending), .5) : undefined;
+};
+d3.min = function(array, f) {
+var i = -1,
+n = array.length,
+a,
+b;
+if (arguments.length === 1) {
+while (++i < n && ((a = array[i]) == null || a != a)) a = undefined;
+while (++i < n) if ((b = array[i]) != null && a > b) a = b;
+} else {
+while (++i < n && ((a = f.call(array, array[i], i)) == null || a != a)) a = undefined;
+while (++i < n) if ((b = f.call(array, array[i], i)) != null && a > b) a = b;
+}
+return a;
+};
+d3.max = function(array, f) {
+var i = -1,
+n = array.length,
+a,
+b;
+if (arguments.length === 1) {
+while (++i < n && ((a = array[i]) == null || a != a)) a = undefined;
+while (++i < n) if ((b = array[i]) != null && b > a) a = b;
+} else {
+while (++i < n && ((a = f.call(array, array[i], i)) == null || a != a)) a = undefined;
+while (++i < n) if ((b = f.call(array, array[i], i)) != null && b > a) a = b;
+}
+return a;
+};
+d3.extent = function(array, f) {
+var i = -1,
+n = array.length,
+a,
+b,
+c;
+if (arguments.length === 1) {
+while (++i < n && ((a = c = array[i]) == null || a != a)) a = c = undefined;
+while (++i < n) if ((b = array[i]) != null) {
+if (a > b) a = b;
+if (c < b) c = b;
+}
+} else {
+while (++i < n && ((a = c = f.call(array, array[i], i)) == null || a != a)) a = undefined;
+while (++i < n) if ((b = f.call(array, array[i], i)) != null) {
+if (a > b) a = b;
+if (c < b) c = b;
+}
+}
+return [a, c];
+};
+d3.random = {
+normal: function(mean, deviation) {
+if (arguments.length < 2) deviation = 1;
+if (arguments.length < 1) mean = 0;
+return function() {
+var x, y, r;
+do {
+x = Math.random() * 2 - 1;
+y = Math.random() * 2 - 1;
+r = x * x + y * y;
+} while (!r || r > 1);
+return mean + deviation * x * Math.sqrt(-2 * Math.log(r) / r);
+};
+}
+};
+function d3_number(x) {
+return x != null && !isNaN(x);
+}
+d3.sum = function(array, f) {
+var s = 0,
+n = array.length,
+a,
+i = -1;
+if (arguments.length === 1) {
+while (++i < n) if (!isNaN(a = +array[i])) s += a;
+} else {
+while (++i < n) if (!isNaN(a = +f.call(array, array[i], i))) s += a;
+}
+return s;
+};
+// R-7 per <http://en.wikipedia.org/wiki/Quantile>
+d3.quantile = function(values, p) {
+var H = (values.length - 1) * p + 1,
+h = Math.floor(H),
+v = values[h - 1],
+e = H - h;
+return e ? v + e * (values[h] - v) : v;
+};
+d3.zip = function() {
+if (!(n = arguments.length)) return [];
+for (var i = -1, m = d3.min(arguments, d3_zipLength), zips = new Array(m); ++i < m;) {
+for (var j = -1, n, zip = zips[i] = new Array(n); ++j < n;) {
+zip[j] = arguments[j][i];
+}
+}
+return zips;
+};
+function d3_zipLength(d) {
+return d.length;
+}
+// Locate the insertion point for x in a to maintain sorted order. The
+// arguments lo and hi may be used to specify a subset of the array which should
+// be considered; by default the entire array is used. If x is already present
+// in a, the insertion point will be before (to the left of) any existing
+// entries. The return value is suitable for use as the first argument to
+// `array.splice` assuming that a is already sorted.
+//
+// The returned insertion point i partitions the array a into two halves so that
+// all v < x for v in a[lo:i] for the left side and all v >= x for v in a[i:hi]
+// for the right side.
+d3.bisectLeft = function(a, x, lo, hi) {
+if (arguments.length < 3) lo = 0;
+if (arguments.length < 4) hi = a.length;
+while (lo < hi) {
+var mid = (lo + hi) >> 1;
+if (a[mid] < x) lo = mid + 1;
+else hi = mid;
+}
+return lo;
+};
+// Similar to bisectLeft, but returns an insertion point which comes after (to
+// the right of) any existing entries of x in a.
+//
+// The returned insertion point i partitions the array into two halves so that
+// all v <= x for v in a[lo:i] for the left side and all v > x for v in a[i:hi]
+// for the right side.
+d3.bisect =
+d3.bisectRight = function(a, x, lo, hi) {
+if (arguments.length < 3) lo = 0;
+if (arguments.length < 4) hi = a.length;
+while (lo < hi) {
+var mid = (lo + hi) >> 1;
+if (x < a[mid]) hi = mid;
+else lo = mid + 1;
+}
+return lo;
+};
+d3.first = function(array, f) {
+var i = 0,
+n = array.length,
+a = array[0],
+b;
+if (arguments.length === 1) f = d3.ascending;
+while (++i < n) {
+if (f.call(array, a, b = array[i]) > 0) {
+a = b;
+}
+}
+return a;
+};
+d3.last = function(array, f) {
+var i = 0,
+n = array.length,
+a = array[0],
+b;
+if (arguments.length === 1) f = d3.ascending;
+while (++i < n) {
+if (f.call(array, a, b = array[i]) <= 0) {
+a = b;
+}
+}
+return a;
+};
+d3.nest = function() {
+var nest = {},
+keys = [],
+sortKeys = [],
+sortValues,
+rollup;
+function map(array, depth) {
+if (depth >= keys.length) return rollup
+? rollup.call(nest, array) : (sortValues
+? array.sort(sortValues)
+: array);
+var i = -1,
+n = array.length,
+key = keys[depth++],
+keyValue,
+object,
+o = {};
+while (++i < n) {
+if ((keyValue = key(object = array[i])) in o) {
+o[keyValue].push(object);
+} else {
+o[keyValue] = [object];
+}
+}
+for (keyValue in o) {
+o[keyValue] = map(o[keyValue], depth);
+}
+return o;
+}
+function entries(map, depth) {
+if (depth >= keys.length) return map;
+var a = [],
+sortKey = sortKeys[depth++],
+key;
+for (key in map) {
+a.push({key: key, values: entries(map[key], depth)});
+}
+if (sortKey) a.sort(function(a, b) {
+return sortKey(a.key, b.key);
+});
+return a;
+}
+nest.map = function(array) {
+return map(array, 0);
+};
+nest.entries = function(array) {
+return entries(map(array, 0), 0);
+};
+nest.key = function(d) {
+keys.push(d);
+return nest;
+};
+// Specifies the order for the most-recently specified key.
+// Note: only applies to entries. Map keys are unordered!
+nest.sortKeys = function(order) {
+sortKeys[keys.length - 1] = order;
+return nest;
+};
+// Specifies the order for leaf values.
+// Applies to both maps and entries array.
+nest.sortValues = function(order) {
+sortValues = order;
+return nest;
+};
+nest.rollup = function(f) {
+rollup = f;
+return nest;
+};
+return nest;
+};
+d3.keys = function(map) {
+var keys = [];
+for (var key in map) keys.push(key);
+return keys;
+};
+d3.values = function(map) {
+var values = [];
+for (var key in map) values.push(map[key]);
+return values;
+};
+d3.entries = function(map) {
+var entries = [];
+for (var key in map) entries.push({key: key, value: map[key]});
+return entries;
+};
+d3.permute = function(array, indexes) {
+var permutes = [],
+i = -1,
+n = indexes.length;
+while (++i < n) permutes[i] = array[indexes[i]];
+return permutes;
+};
+d3.merge = function(arrays) {
+return Array.prototype.concat.apply([], arrays);
+};
+d3.split = function(array, f) {
+var arrays = [],
+values = [],
+value,
+i = -1,
+n = array.length;
+if (arguments.length < 2) f = d3_splitter;
+while (++i < n) {
+if (f.call(values, value = array[i], i)) {
+values = [];
+} else {
+if (!values.length) arrays.push(values);
+values.push(value);
+}
+}
+return arrays;
+};
+function d3_splitter(d) {
+return d == null;
+}
+function d3_collapse(s) {
+return s.replace(/(^\s+)|(\s+$)/g, "").replace(/\s+/g, " ");
+}
+/**
+* @param {number}
+*            start
+* @param {number=}
+*            stop
+* @param {number=}
+*            step
+*/
+d3.range = function(start, stop, step) {
+if (arguments.length < 3) {
+step = 1;
+if (arguments.length < 2) {
+stop = start;
+start = 0;
+}
+}
+if ((stop - start) / step == Infinity) throw new Error("infinite range");
+var range = [],
+i = -1,
+j;
+if (step < 0) while ((j = start + step * ++i) > stop) range.push(j);
+else while ((j = start + step * ++i) < stop) range.push(j);
+return range;
+};
+d3.requote = function(s) {
+return s.replace(d3_requote_re, "\\$&");
+};
+var d3_requote_re = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;
+d3.round = function(x, n) {
+return n
+? Math.round(x * Math.pow(10, n)) * Math.pow(10, -n)
+: Math.round(x);
+};
+d3.xhr = function(url, mime, callback) {
+var req = new XMLHttpRequest;
+if (arguments.length < 3) callback = mime;
+else if (mime && req.overrideMimeType) req.overrideMimeType(mime);
+req.open("GET", url, true);
+req.onreadystatechange = function() {
+if (req.readyState === 4) callback(req.status < 300 ? req : null);
+};
+req.send(null);
+};
+d3.text = function(url, mime, callback) {
+function ready(req) {
+callback(req && req.responseText);
+}
+if (arguments.length < 3) {
+callback = mime;
+mime = null;
+}
+d3.xhr(url, mime, ready);
+};
+d3.json = function(url, callback) {
+d3.text(url, "application/json", function(text) {
+callback(text ? JSON.parse(text) : null);
+});
+};
+d3.html = function(url, callback) {
+d3.text(url, "text/html", function(text) {
+if (text != null) { // Treat empty string as valid HTML.
+var range = document.createRange();
+range.selectNode(document.body);
+text = range.createContextualFragment(text);
+}
+callback(text);
+});
+};
+d3.xml = function(url, mime, callback) {
+function ready(req) {
+callback(req && req.responseXML);
+}
+if (arguments.length < 3) {
+callback = mime;
+mime = null;
+}
+d3.xhr(url, mime, ready);
+};
+d3.ns = {
+prefix: {
+svg: "http://www.w3.org/2000/svg",
+xhtml: "http://www.w3.org/1999/xhtml",
+xlink: "http://www.w3.org/1999/xlink",
+xml: "http://www.w3.org/XML/1998/namespace",
+xmlns: "http://www.w3.org/2000/xmlns/"
+},
+qualify: function(name) {
+var i = name.indexOf(":");
+return i < 0 ? name : {
+space: d3.ns.prefix[name.substring(0, i)],
+local: name.substring(i + 1)
+};
+}
+};
+d3.dispatch = function() {
+var dispatch = new d3_dispatch(),
+i = -1,
+n = arguments.length;
+while (++i < n) dispatch[arguments[i]] = d3_dispatch_event();
+return dispatch;
+};
+function d3_dispatch() {}
+d3_dispatch.prototype.on = function(type, listener) {
+var i = type.indexOf("."),
+name = "";
+// Extract optional namespace, e.g., "click.foo"
+if (i > 0) {
+name = type.substring(i + 1);
+type = type.substring(0, i);
+}
+this[type].on(name, listener);
+};
+function d3_dispatch_event() {
+var listeners = [],
+listenerByName = {};
+function dispatch() {
+var z = listeners, // defensive reference
+i = -1,
+n = z.length,
+l;
+while (++i < n) if ((l = z[i])._on) l.apply(this, arguments);
+}
+dispatch.on = function(name, listener) {
+var l, i;
+// remove the old listener, if any
+if (l = listenerByName[name]) {
+l._on = false;
+listeners = listeners.slice(0, i = listeners.indexOf(l)).concat(listeners.slice(i + 1));
+delete listenerByName[name];
+}
+// add the new listener, if any
+if (listener) {
+listener._on = true;
+listeners.push(listener);
+listenerByName[name] = listener;
+}
+return dispatch;
+};
+return dispatch;
+};
+// TODO align
+d3.format = function(specifier) {
+var match = d3_format_re.exec(specifier),
+fill = match[1] || " ",
+sign = match[3] || "",
+zfill = match[5],
+width = +match[6],
+comma = match[7],
+precision = match[8],
+type = match[9],
+scale = 1,
+suffix = "",
+integer = false;
+if (precision) precision = +precision.substring(1);
+if (zfill) {
+fill = "0"; // TODO align = "=";
+if (comma) width -= Math.floor((width - 1) / 4);
+}
+switch (type) {
+case "n": comma = true; type = "g"; break;
+case "%": scale = 100; suffix = "%"; type = "f"; break;
+case "p": scale = 100; suffix = "%"; type = "r"; break;
+case "d": integer = true; precision = 0; break;
+case "s": scale = -1; type = "r"; break;
+}
+// If no precision is specified for r, fallback to general notation.
+if (type == "r" && !precision) type = "g";
+type = d3_format_types[type] || d3_format_typeDefault;
+return function(value) {
+// Return the empty string for floats formatted as ints.
+if (integer && (value % 1)) return "";
+// Convert negative to positive, and record the sign prefix.
+var negative = (value < 0) && (value = -value) ? "\u2212" : sign;
+// Apply the scale, computing it from the value's exponent for si format.
+if (scale < 0) {
+var prefix = d3.formatPrefix(value, precision);
+value *= prefix.scale;
+suffix = prefix.symbol;
+} else {
+value *= scale;
+}
+// Convert to the desired precision.
+value = type(value, precision);
+// If the fill character is 0, the sign and group is applied after the fill.
+if (zfill) {
+var length = value.length + negative.length;
+if (length < width) value = new Array(width - length + 1).join(fill) + value;
+if (comma) value = d3_format_group(value);
+value = negative + value;
+}
+// Otherwise (e.g., space-filling), the sign and group is applied before.
+else {
+if (comma) value = d3_format_group(value);
+value = negative + value;
+var length = value.length;
+if (length < width) value = new Array(width - length + 1).join(fill) + value;
+}
+return value + suffix;
+};
+};
+// [[fill]align][sign][#][0][width][,][.precision][type]
+var d3_format_re = /(?:([^{])?([<>=^]))?([+\- ])?(#)?(0)?([0-9]+)?(,)?(\.[0-9]+)?([a-zA-Z%])?/;
+var d3_format_types = {
+g: function(x, p) { return x.toPrecision(p); },
+e: function(x, p) { return x.toExponential(p); },
+f: function(x, p) { return x.toFixed(p); },
+r: function(x, p) { return d3.round(x, p = d3_format_precision(x, p)).toFixed(Math.max(0, Math.min(20, p))); }
+};
+function d3_format_precision(x, p) {
+return p - (x ? 1 + Math.floor(Math.log(x + Math.pow(10, 1 + Math.floor(Math.log(x) / Math.LN10) - p)) / Math.LN10) : 1);
+}
+function d3_format_typeDefault(x) {
+return x + "";
+}
+// Apply comma grouping for thousands.
+function d3_format_group(value) {
+var i = value.lastIndexOf("."),
+f = i >= 0 ? value.substring(i) : (i = value.length, ""),
+t = [];
+while (i > 0) t.push(value.substring(i -= 3, i + 3));
+return t.reverse().join(",") + f;
+}
+var d3_formatPrefixes = ["y","z","a","f","p","n","μ","m","","k","M","G","T","P","E","Z","Y"].map(d3_formatPrefix);
+d3.formatPrefix = function(value, precision) {
+var i = 0;
+if (value) {
+if (value < 0) value *= -1;
+if (precision) value = d3.round(value, d3_format_precision(value, precision));
+i = 1 + Math.floor(1e-12 + Math.log(value) / Math.LN10);
+i = Math.max(-24, Math.min(24, Math.floor((i <= 0 ? i + 1 : i - 1) / 3) * 3));
+}
+return d3_formatPrefixes[8 + i / 3];
+};
+function d3_formatPrefix(d, i) {
+return {
+scale: Math.pow(10, (8 - i) * 3),
+symbol: d
+};
+}
+/*
+* TERMS OF USE - EASING EQUATIONS
+*
+* Open source under the BSD License.
+*
+* Copyright 2001 Robert Penner All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are met:
+*  - Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*  - Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*  - Neither the name of the author nor the names of contributors may be used
+* to endorse or promote products derived from this software without specific
+* prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+* POSSIBILITY OF SUCH DAMAGE.
+*/
+var d3_ease_quad = d3_ease_poly(2),
+d3_ease_cubic = d3_ease_poly(3);
+var d3_ease = {
+linear: function() { return d3_ease_linear; },
+poly: d3_ease_poly,
+quad: function() { return d3_ease_quad; },
+cubic: function() { return d3_ease_cubic; },
+sin: function() { return d3_ease_sin; },
+exp: function() { return d3_ease_exp; },
+circle: function() { return d3_ease_circle; },
+elastic: d3_ease_elastic,
+back: d3_ease_back,
+bounce: function() { return d3_ease_bounce; }
+};
+var d3_ease_mode = {
+"in": function(f) { return f; },
+"out": d3_ease_reverse,
+"in-out": d3_ease_reflect,
+"out-in": function(f) { return d3_ease_reflect(d3_ease_reverse(f)); }
+};
+d3.ease = function(name) {
+var i = name.indexOf("-"),
+t = i >= 0 ? name.substring(0, i) : name,
+m = i >= 0 ? name.substring(i + 1) : "in";
+return d3_ease_clamp(d3_ease_mode[m](d3_ease[t].apply(null, Array.prototype.slice.call(arguments, 1))));
+};
+function d3_ease_clamp(f) {
+return function(t) {
+return t <= 0 ? 0 : t >= 1 ? 1 : f(t);
+};
+}
+function d3_ease_reverse(f) {
+return function(t) {
+return 1 - f(1 - t);
+};
+}
+function d3_ease_reflect(f) {
+return function(t) {
+return .5 * (t < .5 ? f(2 * t) : (2 - f(2 - 2 * t)));
+};
+}
+function d3_ease_linear(t) {
+return t;
+}
+function d3_ease_poly(e) {
+return function(t) {
+return Math.pow(t, e);
+}
+}
+function d3_ease_sin(t) {
+return 1 - Math.cos(t * Math.PI / 2);
+}
+function d3_ease_exp(t) {
+return Math.pow(2, 10 * (t - 1));
+}
+function d3_ease_circle(t) {
+return 1 - Math.sqrt(1 - t * t);
+}
+function d3_ease_elastic(a, p) {
+var s;
+if (arguments.length < 2) p = 0.45;
+if (arguments.length < 1) { a = 1; s = p / 4; }
+else s = p / (2 * Math.PI) * Math.asin(1 / a);
+return function(t) {
+return 1 + a * Math.pow(2, 10 * -t) * Math.sin((t - s) * 2 * Math.PI / p);
+};
+}
+function d3_ease_back(s) {
+if (!s) s = 1.70158;
+return function(t) {
+return t * t * ((s + 1) * t - s);
+};
+}
+function d3_ease_bounce(t) {
+return t < 1 / 2.75 ? 7.5625 * t * t
+: t < 2 / 2.75 ? 7.5625 * (t -= 1.5 / 2.75) * t + .75
+: t < 2.5 / 2.75 ? 7.5625 * (t -= 2.25 / 2.75) * t + .9375
+: 7.5625 * (t -= 2.625 / 2.75) * t + .984375;
+}
+d3.event = null;
+function d3_eventCancel() {
+d3.event.stopPropagation();
+d3.event.preventDefault();
+}
+d3.interpolate = function(a, b) {
+var i = d3.interpolators.length, f;
+while (--i >= 0 && !(f = d3.interpolators[i](a, b)));
+return f;
+};
+d3.interpolateNumber = function(a, b) {
+b -= a;
+return function(t) { return a + b * t; };
+};
+d3.interpolateRound = function(a, b) {
+b -= a;
+return function(t) { return Math.round(a + b * t); };
+};
+d3.interpolateString = function(a, b) {
+var m, // current match
+i, // current index
+j, // current index (for coallescing)
+s0 = 0, // start index of current string prefix
+s1 = 0, // end index of current string prefix
+s = [], // string constants and placeholders
+q = [], // number interpolators
+n, // q.length
+o;
+// Reset our regular expression!
+d3_interpolate_number.lastIndex = 0;
+// Find all numbers in b.
+for (i = 0; m = d3_interpolate_number.exec(b); ++i) {
+if (m.index) s.push(b.substring(s0, s1 = m.index));
+q.push({i: s.length, x: m[0]});
+s.push(null);
+s0 = d3_interpolate_number.lastIndex;
+}
+if (s0 < b.length) s.push(b.substring(s0));
+// Find all numbers in a.
+for (i = 0, n = q.length; (m = d3_interpolate_number.exec(a)) && i < n; ++i) {
+o = q[i];
+if (o.x == m[0]) { // The numbers match, so coallesce.
+if (o.i) {
+if (s[o.i + 1] == null) { // This match is followed by another number.
+s[o.i - 1] += o.x;
+s.splice(o.i, 1);
+for (j = i + 1; j < n; ++j) q[j].i--;
+} else { // This match is followed by a string, so coallesce twice.
+s[o.i - 1] += o.x + s[o.i + 1];
+s.splice(o.i, 2);
+for (j = i + 1; j < n; ++j) q[j].i -= 2;
+}
+} else {
+if (s[o.i + 1] == null) { // This match is followed by another number.
+s[o.i] = o.x;
+} else { // This match is followed by a string, so coallesce twice.
+s[o.i] = o.x + s[o.i + 1];
+s.splice(o.i + 1, 1);
+for (j = i + 1; j < n; ++j) q[j].i--;
+}
+}
+q.splice(i, 1);
+n--;
+i--;
+} else {
+o.x = d3.interpolateNumber(parseFloat(m[0]), parseFloat(o.x));
+}
+}
+// Remove any numbers in b not found in a.
+while (i < n) {
+o = q.pop();
+if (s[o.i + 1] == null) { // This match is followed by another number.
+s[o.i] = o.x;
+} else { // This match is followed by a string, so coallesce twice.
+s[o.i] = o.x + s[o.i + 1];
+s.splice(o.i + 1, 1);
+}
+n--;
+}
+// Special optimization for only a single match.
+if (s.length === 1) {
+return s[0] == null ? q[0].x : function() { return b; };
+}
+// Otherwise, interpolate each of the numbers and rejoin the string.
+return function(t) {
+for (i = 0; i < n; ++i) s[(o = q[i]).i] = o.x(t);
+return s.join("");
+};
+};
+d3.interpolateTransform = function(a, b) {
+return d3.interpolateString(d3.transform(a) + "", d3.transform(b) + "");
+};
+d3.interpolateRgb = function(a, b) {
+a = d3.rgb(a);
+b = d3.rgb(b);
+var ar = a.r,
+ag = a.g,
+ab = a.b,
+br = b.r - ar,
+bg = b.g - ag,
+bb = b.b - ab;
+return function(t) {
+return "#"
++ d3_rgb_hex(Math.round(ar + br * t))
++ d3_rgb_hex(Math.round(ag + bg * t))
++ d3_rgb_hex(Math.round(ab + bb * t));
+};
+};
+// interpolates HSL space, but outputs RGB string (for compatibility)
+d3.interpolateHsl = function(a, b) {
+a = d3.hsl(a);
+b = d3.hsl(b);
+var h0 = a.h,
+s0 = a.s,
+l0 = a.l,
+h1 = b.h - h0,
+s1 = b.s - s0,
+l1 = b.l - l0;
+return function(t) {
+return d3_hsl_rgb(h0 + h1 * t, s0 + s1 * t, l0 + l1 * t).toString();
+};
+};
+d3.interpolateArray = function(a, b) {
+var x = [],
+c = [],
+na = a.length,
+nb = b.length,
+n0 = Math.min(a.length, b.length),
+i;
+for (i = 0; i < n0; ++i) x.push(d3.interpolate(a[i], b[i]));
+for (; i < na; ++i) c[i] = a[i];
+for (; i < nb; ++i) c[i] = b[i];
+return function(t) {
+for (i = 0; i < n0; ++i) c[i] = x[i](t);
+return c;
+};
+};
+d3.interpolateObject = function(a, b) {
+var i = {},
+c = {},
+k;
+for (k in a) {
+if (k in b) {
+i[k] = d3_interpolateByName(k)(a[k], b[k]);
+} else {
+c[k] = a[k];
+}
+}
+for (k in b) {
+if (!(k in a)) {
+c[k] = b[k];
+}
+}
+return function(t) {
+for (k in i) c[k] = i[k](t);
+return c;
+};
+}
+var d3_interpolate_number = /[-+]?(?:\d*\.?\d+)(?:[eE][-+]?\d+)?/g;
+function d3_interpolateByName(n) {
+return n == "transform"
+? d3.interpolateTransform
+: d3.interpolate;
+}
+d3.interpolators = [
+d3.interpolateObject,
+function(a, b) { return (b instanceof Array) && d3.interpolateArray(a, b); },
+function(a, b) { return (typeof b === "string") && d3.interpolateString(a + "", b); },
+function(a, b) { return (typeof b === "string" ? b in d3_rgb_names || /^(#|rgb\(|hsl\()/.test(b) : b instanceof d3_Rgb || b instanceof d3_Hsl) && d3.interpolateRgb(a + "", b); },
+function(a, b) { return (typeof b === "number") && d3.interpolateNumber(+a, b); }
+];
+function d3_uninterpolateNumber(a, b) {
+b = b - (a = +a) ? 1 / (b - a) : 0;
+return function(x) { return (x - a) * b; };
+}
+function d3_uninterpolateClamp(a, b) {
+b = b - (a = +a) ? 1 / (b - a) : 0;
+return function(x) { return Math.max(0, Math.min(1, (x - a) * b)); };
+}
+d3.rgb = function(r, g, b) {
+return arguments.length === 1
+? (r instanceof d3_Rgb ? d3_rgb(r.r, r.g, r.b)
+: d3_rgb_parse("" + r, d3_rgb, d3_hsl_rgb))
+: d3_rgb(~~r, ~~g, ~~b);
+};
+function d3_rgb(r, g, b) {
+return new d3_Rgb(r, g, b);
+}
+function d3_Rgb(r, g, b) {
+this.r = r;
+this.g = g;
+this.b = b;
+}
+d3_Rgb.prototype.brighter = function(k) {
+k = Math.pow(0.7, arguments.length ? k : 1);
+var r = this.r,
+g = this.g,
+b = this.b,
+i = 30;
+if (!r && !g && !b) return d3_rgb(i, i, i);
+if (r && r < i) r = i;
+if (g && g < i) g = i;
+if (b && b < i) b = i;
+return d3_rgb(
+Math.min(255, Math.floor(r / k)),
+Math.min(255, Math.floor(g / k)),
+Math.min(255, Math.floor(b / k)));
+};
+d3_Rgb.prototype.darker = function(k) {
+k = Math.pow(0.7, arguments.length ? k : 1);
+return d3_rgb(
+Math.floor(k * this.r),
+Math.floor(k * this.g),
+Math.floor(k * this.b));
+};
+d3_Rgb.prototype.hsl = function() {
+return d3_rgb_hsl(this.r, this.g, this.b);
+};
+d3_Rgb.prototype.toString = function() {
+return "#" + d3_rgb_hex(this.r) + d3_rgb_hex(this.g) + d3_rgb_hex(this.b);
+};
+function d3_rgb_hex(v) {
+return v < 0x10
+? "0" + Math.max(0, v).toString(16)
+: Math.min(255, v).toString(16);
+}
+function d3_rgb_parse(format, rgb, hsl) {
+var r = 0, // red channel; int in [0, 255]
+g = 0, // green channel; int in [0, 255]
+b = 0, // blue channel; int in [0, 255]
+m1, // CSS color specification match
+m2, // CSS color specification type (e.g., rgb)
+name;
+/* Handle hsl, rgb. */
+m1 = /([a-z]+)\((.*)\)/i.exec(format);
+if (m1) {
+m2 = m1[2].split(",");
+switch (m1[1]) {
+case "hsl": {
+return hsl(
+parseFloat(m2[0]), // degrees
+parseFloat(m2[1]) / 100, // percentage
+parseFloat(m2[2]) / 100 // percentage
+);
+}
+case "rgb": {
+return rgb(
+d3_rgb_parseNumber(m2[0]),
+d3_rgb_parseNumber(m2[1]),
+d3_rgb_parseNumber(m2[2])
+);
+}
+}
+}
+/* Named colors. */
+if (name = d3_rgb_names[format]) return rgb(name.r, name.g, name.b);
+/* Hexadecimal colors: #rgb and #rrggbb. */
+if (format != null && format.charAt(0) === "#") {
+if (format.length === 4) {
+r = format.charAt(1); r += r;
+g = format.charAt(2); g += g;
+b = format.charAt(3); b += b;
+} else if (format.length === 7) {
+r = format.substring(1, 3);
+g = format.substring(3, 5);
+b = format.substring(5, 7);
+}
+r = parseInt(r, 16);
+g = parseInt(g, 16);
+b = parseInt(b, 16);
+}
+return rgb(r, g, b);
+}
+function d3_rgb_hsl(r, g, b) {
+var min = Math.min(r /= 255, g /= 255, b /= 255),
+max = Math.max(r, g, b),
+d = max - min,
+h,
+s,
+l = (max + min) / 2;
+if (d) {
+s = l < .5 ? d / (max + min) : d / (2 - max - min);
+if (r == max) h = (g - b) / d + (g < b ? 6 : 0);
+else if (g == max) h = (b - r) / d + 2;
+else h = (r - g) / d + 4;
+h *= 60;
+} else {
+s = h = 0;
+}
+return d3_hsl(h, s, l);
+}
+function d3_rgb_parseNumber(c) { // either integer or percentage
+var f = parseFloat(c);
+return c.charAt(c.length - 1) === "%" ? Math.round(f * 2.55) : f;
+}
+var d3_rgb_names = {
+aliceblue: "#f0f8ff",
+antiquewhite: "#faebd7",
+aqua: "#00ffff",
+aquamarine: "#7fffd4",
+azure: "#f0ffff",
+beige: "#f5f5dc",
+bisque: "#ffe4c4",
+black: "#000000",
+blanchedalmond: "#ffebcd",
+blue: "#0000ff",
+blueviolet: "#8a2be2",
+brown: "#a52a2a",
+burlywood: "#deb887",
+cadetblue: "#5f9ea0",
+chartreuse: "#7fff00",
+chocolate: "#d2691e",
+coral: "#ff7f50",
+cornflowerblue: "#6495ed",
+cornsilk: "#fff8dc",
+crimson: "#dc143c",
+cyan: "#00ffff",
+darkblue: "#00008b",
+darkcyan: "#008b8b",
+darkgoldenrod: "#b8860b",
+darkgray: "#a9a9a9",
+darkgreen: "#006400",
+darkgrey: "#a9a9a9",
+darkkhaki: "#bdb76b",
+darkmagenta: "#8b008b",
+darkolivegreen: "#556b2f",
+darkorange: "#ff8c00",
+darkorchid: "#9932cc",
+darkred: "#8b0000",
+darksalmon: "#e9967a",
+darkseagreen: "#8fbc8f",
+darkslateblue: "#483d8b",
+darkslategray: "#2f4f4f",
+darkslategrey: "#2f4f4f",
+darkturquoise: "#00ced1",
+darkviolet: "#9400d3",
+deeppink: "#ff1493",
+deepskyblue: "#00bfff",
+dimgray: "#696969",
+dimgrey: "#696969",
+dodgerblue: "#1e90ff",
+firebrick: "#b22222",
+floralwhite: "#fffaf0",
+forestgreen: "#228b22",
+fuchsia: "#ff00ff",
+gainsboro: "#dcdcdc",
+ghostwhite: "#f8f8ff",
+gold: "#ffd700",
+goldenrod: "#daa520",
+gray: "#808080",
+green: "#008000",
+greenyellow: "#adff2f",
+grey: "#808080",
+honeydew: "#f0fff0",
+hotpink: "#ff69b4",
+indianred: "#cd5c5c",
+indigo: "#4b0082",
+ivory: "#fffff0",
+khaki: "#f0e68c",
+lavender: "#e6e6fa",
+lavenderblush: "#fff0f5",
+lawngreen: "#7cfc00",
+lemonchiffon: "#fffacd",
+lightblue: "#add8e6",
+lightcoral: "#f08080",
+lightcyan: "#e0ffff",
+lightgoldenrodyellow: "#fafad2",
+lightgray: "#d3d3d3",
+lightgreen: "#90ee90",
+lightgrey: "#d3d3d3",
+lightpink: "#ffb6c1",
+lightsalmon: "#ffa07a",
+lightseagreen: "#20b2aa",
+lightskyblue: "#87cefa",
+lightslategray: "#778899",
+lightslategrey: "#778899",
+lightsteelblue: "#b0c4de",
+lightyellow: "#ffffe0",
+lime: "#00ff00",
+limegreen: "#32cd32",
+linen: "#faf0e6",
+magenta: "#ff00ff",
+maroon: "#800000",
+mediumaquamarine: "#66cdaa",
+mediumblue: "#0000cd",
+mediumorchid: "#ba55d3",
+mediumpurple: "#9370db",
+mediumseagreen: "#3cb371",
+mediumslateblue: "#7b68ee",
+mediumspringgreen: "#00fa9a",
+mediumturquoise: "#48d1cc",
+mediumvioletred: "#c71585",
+midnightblue: "#191970",
+mintcream: "#f5fffa",
+mistyrose: "#ffe4e1",
+moccasin: "#ffe4b5",
+navajowhite: "#ffdead",
+navy: "#000080",
+oldlace: "#fdf5e6",
+olive: "#808000",
+olivedrab: "#6b8e23",
+orange: "#ffa500",
+orangered: "#ff4500",
+orchid: "#da70d6",
+palegoldenrod: "#eee8aa",
+palegreen: "#98fb98",
+paleturquoise: "#afeeee",
+palevioletred: "#db7093",
+papayawhip: "#ffefd5",
+peachpuff: "#ffdab9",
+peru: "#cd853f",
+pink: "#ffc0cb",
+plum: "#dda0dd",
+powderblue: "#b0e0e6",
+purple: "#800080",
+red: "#ff0000",
+rosybrown: "#bc8f8f",
+royalblue: "#4169e1",
+saddlebrown: "#8b4513",
+salmon: "#fa8072",
+sandybrown: "#f4a460",
+seagreen: "#2e8b57",
+seashell: "#fff5ee",
+sienna: "#a0522d",
+silver: "#c0c0c0",
+skyblue: "#87ceeb",
+slateblue: "#6a5acd",
+slategray: "#708090",
+slategrey: "#708090",
+snow: "#fffafa",
+springgreen: "#00ff7f",
+steelblue: "#4682b4",
+tan: "#d2b48c",
+teal: "#008080",
+thistle: "#d8bfd8",
+tomato: "#ff6347",
+turquoise: "#40e0d0",
+violet: "#ee82ee",
+wheat: "#f5deb3",
+white: "#ffffff",
+whitesmoke: "#f5f5f5",
+yellow: "#ffff00",
+yellowgreen: "#9acd32"
+};
+for (var d3_rgb_name in d3_rgb_names) {
+d3_rgb_names[d3_rgb_name] = d3_rgb_parse(
+d3_rgb_names[d3_rgb_name],
+d3_rgb,
+d3_hsl_rgb);
+}
+d3.hsl = function(h, s, l) {
+return arguments.length === 1
+? (h instanceof d3_Hsl ? d3_hsl(h.h, h.s, h.l)
+: d3_rgb_parse("" + h, d3_rgb_hsl, d3_hsl))
+: d3_hsl(+h, +s, +l);
+};
+function d3_hsl(h, s, l) {
+return new d3_Hsl(h, s, l);
+}
+function d3_Hsl(h, s, l) {
+this.h = h;
+this.s = s;
+this.l = l;
+}
+d3_Hsl.prototype.brighter = function(k) {
+k = Math.pow(0.7, arguments.length ? k : 1);
+return d3_hsl(this.h, this.s, this.l / k);
+};
+d3_Hsl.prototype.darker = function(k) {
+k = Math.pow(0.7, arguments.length ? k : 1);
+return d3_hsl(this.h, this.s, k * this.l);
+};
+d3_Hsl.prototype.rgb = function() {
+return d3_hsl_rgb(this.h, this.s, this.l);
+};
+d3_Hsl.prototype.toString = function() {
+return this.rgb().toString();
+};
+function d3_hsl_rgb(h, s, l) {
+var m1,
+m2;
+/* Some simple corrections for h, s and l. */
+h = h % 360; if (h < 0) h += 360;
+s = s < 0 ? 0 : s > 1 ? 1 : s;
+l = l < 0 ? 0 : l > 1 ? 1 : l;
+/* From FvD 13.37, CSS Color Module Level 3 */
+m2 = l <= .5 ? l * (1 + s) : l + s - l * s;
+m1 = 2 * l - m2;
+function v(h) {
+if (h > 360) h -= 360;
+else if (h < 0) h += 360;
+if (h < 60) return m1 + (m2 - m1) * h / 60;
+if (h < 180) return m2;
+if (h < 240) return m1 + (m2 - m1) * (240 - h) / 60;
+return m1;
+}
+function vv(h) {
+return Math.round(v(h) * 255);
+}
+return d3_rgb(vv(h + 120), vv(h), vv(h - 120));
+}
+function d3_selection(groups) {
+d3_arraySubclass(groups, d3_selectionPrototype);
+return groups;
+}
+var d3_select = function(s, n) { return n.querySelector(s); },
+d3_selectAll = function(s, n) { return n.querySelectorAll(s); };
+// Prefer Sizzle, if available.
+if (typeof Sizzle === "function") {
+d3_select = function(s, n) { return Sizzle(s, n)[0]; };
+d3_selectAll = function(s, n) { return Sizzle.uniqueSort(Sizzle(s, n)); };
+}
+var d3_selectionPrototype = [];
+d3.selection = function() {
+return d3_selectionRoot;
+};
+d3.selection.prototype = d3_selectionPrototype;
+d3_selectionPrototype.select = function(selector) {
+var subgroups = [],
+subgroup,
+subnode,
+group,
+node;
+if (typeof selector !== "function") selector = d3_selection_selector(selector);
+for (var j = -1, m = this.length; ++j < m;) {
+subgroups.push(subgroup = []);
+subgroup.parentNode = (group = this[j]).parentNode;
+for (var i = -1, n = group.length; ++i < n;) {
+if (node = group[i]) {
+subgroup.push(subnode = selector.call(node, node.__data__, i));
+if (subnode && "__data__" in node) subnode.__data__ = node.__data__;
+} else {
+subgroup.push(null);
+}
+}
+}
+return d3_selection(subgroups);
+};
+function d3_selection_selector(selector) {
+return function() {
+return d3_select(selector, this);
+};
+}
+d3_selectionPrototype.selectAll = function(selector) {
+var subgroups = [],
+subgroup,
+node;
+if (typeof selector !== "function") selector = d3_selection_selectorAll(selector);
+for (var j = -1, m = this.length; ++j < m;) {
+for (var group = this[j], i = -1, n = group.length; ++i < n;) {
+if (node = group[i]) {
+subgroups.push(subgroup = d3_array(selector.call(node, node.__data__, i)));
+subgroup.parentNode = node;
+}
+}
+}
+return d3_selection(subgroups);
+};
+function d3_selection_selectorAll(selector) {
+return function() {
+return d3_selectAll(selector, this);
+};
+}
+d3_selectionPrototype.attr = function(name, value) {
+name = d3.ns.qualify(name);
+// If no value is specified, return the first value.
+if (arguments.length < 2) {
+var node = this.node();
+return name.local
+? node.getAttributeNS(name.space, name.local)
+: node.getAttribute(name);
+}
+function attrNull() {
+this.removeAttribute(name);
+}
+function attrNullNS() {
+this.removeAttributeNS(name.space, name.local);
+}
+function attrConstant() {
+this.setAttribute(name, value);
+}
+function attrConstantNS() {
+this.setAttributeNS(name.space, name.local, value);
+}
+function attrFunction() {
+var x = value.apply(this, arguments);
+if (x == null) this.removeAttribute(name);
+else this.setAttribute(name, x);
+}
+function attrFunctionNS() {
+var x = value.apply(this, arguments);
+if (x == null) this.removeAttributeNS(name.space, name.local);
+else this.setAttributeNS(name.space, name.local, x);
+}
+return this.each(value == null
+? (name.local ? attrNullNS : attrNull) : (typeof value === "function"
+? (name.local ? attrFunctionNS : attrFunction)
+: (name.local ? attrConstantNS : attrConstant)));
+};
+d3_selectionPrototype.classed = function(name, value) {
+var names = name.split(d3_selection_classedWhitespace),
+n = names.length,
+i = -1;
+if (arguments.length > 1) {
+while (++i < n) d3_selection_classed.call(this, names[i], value);
+return this;
+} else {
+while (++i < n) if (!d3_selection_classed.call(this, names[i])) return false;
+return true;
+}
+};
+var d3_selection_classedWhitespace = /\s+/g;
+function d3_selection_classed(name, value) {
+var re = new RegExp("(^|\\s+)" + d3.requote(name) + "(\\s+|$)", "g");
+// If no value is specified, return the first value.
+if (arguments.length < 2) {
+var node = this.node();
+if (c = node.classList) return c.contains(name);
+var c = node.className;
+re.lastIndex = 0;
+return re.test(c.baseVal != null ? c.baseVal : c);
+}
+function classedAdd() {
+if (c = this.classList) return c.add(name);
+var c = this.className,
+cb = c.baseVal != null,
+cv = cb ? c.baseVal : c;
+re.lastIndex = 0;
+if (!re.test(cv)) {
+cv = d3_collapse(cv + " " + name);
+if (cb) c.baseVal = cv;
+else this.className = cv;
+}
+}
+function classedRemove() {
+if (c = this.classList) return c.remove(name);
+var c = this.className,
+cb = c.baseVal != null,
+cv = cb ? c.baseVal : c;
+cv = d3_collapse(cv.replace(re, " "));
+if (cb) c.baseVal = cv;
+else this.className = cv;
+}
+function classedFunction() {
+(value.apply(this, arguments)
+? classedAdd
+: classedRemove).call(this);
+}
+return this.each(typeof value === "function"
+? classedFunction : value
+? classedAdd
+: classedRemove);
+}
+d3_selectionPrototype.style = function(name, value, priority) {
+if (arguments.length < 3) priority = "";
+// If no value is specified, return the first value.
+if (arguments.length < 2) return window
+.getComputedStyle(this.node(), null)
+.getPropertyValue(name);
+function styleNull() {
+this.style.removeProperty(name);
+}
+function styleConstant() {
+this.style.setProperty(name, value, priority);
+}
+function styleFunction() {
+var x = value.apply(this, arguments);
+if (x == null) this.style.removeProperty(name);
+else this.style.setProperty(name, x, priority);
+}
+return this.each(value == null
+? styleNull : (typeof value === "function"
+? styleFunction : styleConstant));
+};
+d3_selectionPrototype.property = function(name, value) {
+// If no value is specified, return the first value.
+if (arguments.length < 2) return this.node()[name];
+function propertyNull() {
+delete this[name];
+}
+function propertyConstant() {
+this[name] = value;
+}
+function propertyFunction() {
+var x = value.apply(this, arguments);
+if (x == null) delete this[name];
+else this[name] = x;
+}
+return this.each(value == null
+? propertyNull : (typeof value === "function"
+? propertyFunction : propertyConstant));
+};
+// TODO addition to get this shortcut
+d3_selectionPrototype.datum = function(name, value) {
+return arguments.length < 2
+? this.property("__data__")[name]
+: this.property("__data__")[name] = value;
+};
+d3_selectionPrototype.text = function(value) {
+return arguments.length < 1 ? this.node().textContent
+: (this.each(typeof value === "function"
+? function() { this.textContent = value.apply(this, arguments); }
+: function() { this.textContent = value; }));
+};
+d3_selectionPrototype.html = function(value) {
+return arguments.length < 1 ? this.node().innerHTML
+: (this.each(typeof value === "function"
+? function() { this.innerHTML = value.apply(this, arguments); }
+: function() { this.innerHTML = value; }));
+};
+// TODO append(node)?
+// TODO append(function)?
+d3_selectionPrototype.append = function(name) {
+name = d3.ns.qualify(name);
+function append() {
+return this.appendChild(document.createElement(name));
+}
+function appendNS() {
+return this.appendChild(document.createElementNS(name.space, name.local));
+}
+return this.select(name.local ? appendNS : append);
+};
+// TODO insert(node, function)?
+// TODO insert(function, string)?
+// TODO insert(function, function)?
+d3_selectionPrototype.insert = function(name, before) {
+name = d3.ns.qualify(name);
+function insert() {
+return this.insertBefore(
+document.createElement(name),
+d3_select(before, this));
+}
+function insertNS() {
+return this.insertBefore(
+document.createElementNS(name.space, name.local),
+d3_select(before, this));
+}
+return this.select(name.local ? insertNS : insert);
+};
+// TODO remove(selector)?
+// TODO remove(node)?
+// TODO remove(function)?
+d3_selectionPrototype.remove = function() {
+return this.each(function() {
+var parent = this.parentNode;
+if (parent) parent.removeChild(this);
+});
+};
+// TODO data(null) for clearing data?
+d3_selectionPrototype.data = function(data, join) {
+var enter = [],
+update = [],
+exit = [];
+function bind(group, groupData) {
+var i,
+n = group.length,
+m = groupData.length,
+n0 = Math.min(n, m),
+n1 = Math.max(n, m),
+updateNodes = [],
+enterNodes = [],
+exitNodes = [],
+node,
+nodeData;
+if (join) {
+var nodeByKey = {},
+keys = [],
+key,
+j = groupData.length;
+for (i = -1; ++i < n;) {
+key = join.call(node = group[i], node.__data__, i);
+if (key in nodeByKey) {
+exitNodes[j++] = node; // duplicate key
+} else {
+nodeByKey[key] = node;
+}
+keys.push(key);
+}
+for (i = -1; ++i < m;) {
+node = nodeByKey[key = join.call(groupData, nodeData = groupData[i], i)];
+if (node) {
+node.__data__ = nodeData;
+updateNodes[i] = node;
+enterNodes[i] = exitNodes[i] = null;
+} else {
+enterNodes[i] = d3_selection_dataNode(nodeData);
+updateNodes[i] = exitNodes[i] = null;
+}
+delete nodeByKey[key];
+}
+for (i = -1; ++i < n;) {
+if (keys[i] in nodeByKey) {
+exitNodes[i] = group[i];
+}
+}
+} else {
+for (i = -1; ++i < n0;) {
+node = group[i];
+nodeData = groupData[i];
+if (node) {
+node.__data__ = nodeData;
+updateNodes[i] = node;
+enterNodes[i] = exitNodes[i] = null;
+} else {
+enterNodes[i] = d3_selection_dataNode(nodeData);
+updateNodes[i] = exitNodes[i] = null;
+}
+}
+for (; i < m; ++i) {
+enterNodes[i] = d3_selection_dataNode(groupData[i]);
+updateNodes[i] = exitNodes[i] = null;
+}
+for (; i < n1; ++i) {
+exitNodes[i] = group[i];
+enterNodes[i] = updateNodes[i] = null;
+}
+}
+enterNodes.update
+= updateNodes;
+enterNodes.parentNode
+= updateNodes.parentNode
+= exitNodes.parentNode
+= group.parentNode;
+enter.push(enterNodes);
+update.push(updateNodes);
+exit.push(exitNodes);
+}
+var i = -1,
+n = this.length,
+group;
+if (typeof data === "function") {
+while (++i < n) {
+bind(group = this[i], data.call(group, group.parentNode.__data__, i));
+}
+} else {
+while (++i < n) {
+bind(group = this[i], data);
+}
+}
+var selection = d3_selection(update);
+selection.enter = function() { return d3_selection_enter(enter); };
+selection.exit = function() { return d3_selection(exit); };
+return selection;
+};
+function d3_selection_dataNode(data) {
+return {__data__: data};
+}
+// TODO preserve null elements to maintain index?
+d3_selectionPrototype.filter = function(filter) {
+var subgroups = [],
+subgroup,
+group,
+node;
+for (var j = 0, m = this.length; j < m; j++) {
+subgroups.push(subgroup = []);
+subgroup.parentNode = (group = this[j]).parentNode;
+for (var i = 0, n = group.length; i < n; i++) {
+if ((node = group[i]) && filter.call(node, node.__data__, i)) {
+subgroup.push(node);
+}
+}
+}
+return d3_selection(subgroups);
+};
+d3_selectionPrototype.map = function(map) {
+return this.each(function() {
+this.__data__ = map.apply(this, arguments);
+});
+};
+d3_selectionPrototype.sort = function(comparator) {
+comparator = d3_selection_sortComparator.apply(this, arguments);
+for (var j = 0, m = this.length; j < m; j++) {
+for (var group = this[j].sort(comparator), i = 1, n = group.length, prev = group[0]; i < n; i++) {
+var node = group[i];
+if (node) {
+if (prev) prev.parentNode.insertBefore(node, prev.nextSibling);
+prev = node;
+}
+}
+}
+return this;
+};
+function d3_selection_sortComparator(comparator) {
+if (!arguments.length) comparator = d3.ascending;
+return function(a, b) {
+return comparator(a && a.__data__, b && b.__data__);
+};
+}
+// type can be namespaced, e.g., "click.foo"
+// listener can be null for removal
+d3_selectionPrototype.on = function(type, listener, capture) {
+if (arguments.length < 3) capture = false;
+// parse the type specifier
+var name = "__on" + type, i = type.indexOf(".");
+if (i > 0) type = type.substring(0, i);
+// if called with only one argument, return the current listener
+if (arguments.length < 2) return (i = this.node()[name]) && i._;
+// remove the old event listener, and add the new event listener
+return this.each(function(d, i) {
+var node = this;
+if (node[name]) node.removeEventListener(type, node[name], capture);
+if (listener) node.addEventListener(type, node[name] = l, capture);
+// wrapped event listener that preserves i
+function l(e) {
+var o = d3.event; // Events can be reentrant (e.g., focus).
+d3.event = e;
+try {
+listener.call(node, node.__data__, i);
+} finally {
+d3.event = o;
+}
+}
+// stash the unwrapped listener for retrieval
+l._ = listener;
+});
+};
+d3_selectionPrototype.each = function(callback) {
+for (var j = -1, m = this.length; ++j < m;) {
+for (var group = this[j], i = -1, n = group.length; ++i < n;) {
+var node = group[i];
+if (node) callback.call(node, node.__data__, i, j);
+}
+}
+return this;
+};
+//
+// Note: assigning to the arguments array simultaneously changes the value of
+// the corresponding argument!
+//
+// TODO The `this` argument probably shouldn't be the first argument to the
+// callback, anyway, since it's redundant. However, that will require a major
+// version bump due to backwards compatibility, so I'm not changing it right
+// away.
+//
+d3_selectionPrototype.call = function(callback) {
+callback.apply(this, (arguments[0] = this, arguments));
+return this;
+};
+d3_selectionPrototype.empty = function() {
+return !this.node();
+};
+d3_selectionPrototype.node = function(callback) {
+for (var j = 0, m = this.length; j < m; j++) {
+for (var group = this[j], i = 0, n = group.length; i < n; i++) {
+var node = group[i];
+if (node) return node;
+}
+}
+return null;
+};
+d3_selectionPrototype.transition = function() {
+var subgroups = [],
+subgroup,
+node;
+for (var j = -1, m = this.length; ++j < m;) {
+subgroups.push(subgroup = []);
+for (var group = this[j], i = -1, n = group.length; ++i < n;) {
+subgroup.push((node = group[i]) ? {node: node, delay: 0, duration: 250} : null);
+}
+}
+return d3_transition(subgroups, d3_transitionInheritId || ++d3_transitionId, Date.now());
+};
+var d3_selectionRoot = d3_selection([[document]]);
+d3_selectionRoot[0].parentNode = document.documentElement;
+// TODO fast singleton implementation!
+// TODO select(function)
+d3.select = function(selector) {
+return typeof selector === "string"
+? d3_selectionRoot.select(selector)
+: d3_selection([[selector]]); // assume node
+};
+// TODO selectAll(function)
+d3.selectAll = function(selector) {
+return typeof selector === "string"
+? d3_selectionRoot.selectAll(selector)
+: d3_selection([d3_array(selector)]); // assume node[]
+};
+function d3_selection_enter(selection) {
+d3_arraySubclass(selection, d3_selection_enterPrototype);
+return selection;
+}
+var d3_selection_enterPrototype = [];
+d3_selection_enterPrototype.append = d3_selectionPrototype.append;
+d3_selection_enterPrototype.insert = d3_selectionPrototype.insert;
+d3_selection_enterPrototype.empty = d3_selectionPrototype.empty;
+d3_selection_enterPrototype.node = d3_selectionPrototype.node;
+d3_selection_enterPrototype.select = function(selector) {
+var subgroups = [],
+subgroup,
+subnode,
+upgroup,
+group,
+node;
+for (var j = -1, m = this.length; ++j < m;) {
+upgroup = (group = this[j]).update;
+subgroups.push(subgroup = []);
+subgroup.parentNode = group.parentNode;
+for (var i = -1, n = group.length; ++i < n;) {
+if (node = group[i]) {
+subgroup.push(upgroup[i] = subnode = selector.call(group.parentNode, node.__data__, i));
+subnode.__data__ = node.__data__;
+} else {
+subgroup.push(null);
+}
+}
+}
+return d3_selection(subgroups);
+};
+function d3_transition(groups, id, time) {
+d3_arraySubclass(groups, d3_transitionPrototype);
+var tweens = {},
+event = d3.dispatch("start", "end"),
+ease = d3_transitionEase;
+groups.id = id;
+groups.time = time;
+groups.tween = function(name, tween) {
+if (arguments.length < 2) return tweens[name];
+if (tween == null) delete tweens[name];
+else tweens[name] = tween;
+return groups;
+};
+groups.ease = function(value) {
+if (!arguments.length) return ease;
+ease = typeof value === "function" ? value : d3.ease.apply(d3, arguments);
+return groups;
+};
+groups.each = function(type, listener) {
+if (arguments.length < 2) return d3_transition_each.call(groups, type);
+event.on(type, listener);
+return groups;
+};
+d3.timer(function(elapsed) {
+groups.each(function(d, i, j) {
+var tweened = [],
+node = this,
+delay = groups[j][i].delay,
+duration = groups[j][i].duration,
+lock = node.__transition__ || (node.__transition__ = {active: 0, count: 0});
+++lock.count;
+delay <= elapsed ? start(elapsed) : d3.timer(start, delay, time);
+function start(elapsed) {
+if (lock.active > id) return stop();
+lock.active = id;
+for (var tween in tweens) {
+if (tween = tweens[tween].call(node, d, i)) {
+tweened.push(tween);
+}
+}
+event.start.call(node, d, i);
+if (!tick(elapsed)) d3.timer(tick, 0, time);
+return 1;
+}
+function tick(elapsed) {
+if (lock.active !== id) return stop();
+var t = (elapsed - delay) / duration,
+e = ease(t),
+n = tweened.length;
+while (n > 0) {
+tweened[--n].call(node, e);
+}
+if (t >= 1) {
+stop();
+d3_transitionInheritId = id;
+event.end.call(node, d, i);
+d3_transitionInheritId = 0;
+return 1;
+}
+}
+function stop() {
+if (!--lock.count) delete node.__transition__;
+return 1;
+}
+});
+return 1;
+}, 0, time);
+return groups;
+}
+var d3_transitionRemove = {};
+function d3_transitionNull(d, i, a) {
+return a != "" && d3_transitionRemove;
+}
+function d3_transitionTween(name, b) {
+var interpolate = d3_interpolateByName(name);
+function transitionFunction(d, i, a) {
+var v = b.call(this, d, i);
+return v == null
+? a != "" && d3_transitionRemove
+: a != v && interpolate(a, v);
+}
+function transitionString(d, i, a) {
+return a != b && interpolate(a, b);
+}
+return typeof b === "function" ? transitionFunction
+: b == null ? d3_transitionNull
+: (b += "", transitionString);
+}
+var d3_transitionPrototype = [],
+d3_transitionId = 0,
+d3_transitionInheritId = 0,
+d3_transitionEase = d3.ease("cubic-in-out");
+d3_transitionPrototype.call = d3_selectionPrototype.call;
+d3.transition = function() {
+return d3_selectionRoot.transition();
+};
+d3.transition.prototype = d3_transitionPrototype;
+d3_transitionPrototype.select = function(selector) {
+var subgroups = [],
+subgroup,
+subnode,
+node;
+if (typeof selector !== "function") selector = d3_selection_selector(selector);
+for (var j = -1, m = this.length; ++j < m;) {
+subgroups.push(subgroup = []);
+for (var group = this[j], i = -1, n = group.length; ++i < n;) {
+if ((node = group[i]) && (subnode = selector.call(node.node, node.node.__data__, i))) {
+if ("__data__" in node.node) subnode.__data__ = node.node.__data__;
+subgroup.push({node: subnode, delay: node.delay, duration: node.duration});
+} else {
+subgroup.push(null);
+}
+}
+}
+return d3_transition(subgroups, this.id, this.time).ease(this.ease());
+};
+d3_transitionPrototype.selectAll = function(selector) {
+var subgroups = [],
+subgroup,
+subnodes,
+node;
+if (typeof selector !== "function") selector = d3_selection_selectorAll(selector);
+for (var j = -1, m = this.length; ++j < m;) {
+for (var group = this[j], i = -1, n = group.length; ++i < n;) {
+if (node = group[i]) {
+subnodes = selector.call(node.node, node.node.__data__, i);
+subgroups.push(subgroup = []);
+for (var k = -1, o = subnodes.length; ++k < o;) {
+subgroup.push({node: subnodes[k], delay: node.delay, duration: node.duration});
+}
+}
+}
+}
+return d3_transition(subgroups, this.id, this.time).ease(this.ease());
+};
+d3_transitionPrototype.attr = function(name, value) {
+return this.attrTween(name, d3_transitionTween(name, value));
+};
+d3_transitionPrototype.attrTween = function(nameNS, tween) {
+var name = d3.ns.qualify(nameNS);
+function attrTween(d, i) {
+var f = tween.call(this, d, i, this.getAttribute(name));
+return f === d3_transitionRemove
+? (this.removeAttribute(name), null)
+: f && function(t) { this.setAttribute(name, f(t)); };
+}
+function attrTweenNS(d, i) {
+var f = tween.call(this, d, i, this.getAttributeNS(name.space, name.local));
+return f === d3_transitionRemove
+? (this.removeAttributeNS(name.space, name.local), null)
+: f && function(t) { this.setAttributeNS(name.space, name.local, f(t)); };
+}
+return this.tween("attr." + nameNS, name.local ? attrTweenNS : attrTween);
+};
+d3_transitionPrototype.style = function(name, value, priority) {
+if (arguments.length < 3) priority = "";
+return this.styleTween(name, d3_transitionTween(name, value), priority);
+};
+d3_transitionPrototype.styleTween = function(name, tween, priority) {
+if (arguments.length < 3) priority = "";
+return this.tween("style." + name, function(d, i) {
+var f = tween.call(this, d, i, window.getComputedStyle(this, null).getPropertyValue(name));
+return f === d3_transitionRemove
+? (this.style.removeProperty(name), null)
+: f && function(t) { this.style.setProperty(name, f(t), priority); };
+});
+};
+d3_transitionPrototype.text = function(value) {
+return this.tween("text", function(d, i) {
+this.textContent = typeof value === "function"
+? value.call(this, d, i)
+: value;
+});
+};
+d3_transitionPrototype.remove = function() {
+return this.each("end", function() {
+var p;
+if (!this.__transition__ && (p = this.parentNode)) p.removeChild(this);
+});
+};
+d3_transitionPrototype.delay = function(value) {
+var groups = this;
+return groups.each(typeof value === "function"
+? function(d, i, j) { groups[j][i].delay = +value.apply(this, arguments); }
+: (value = +value, function(d, i, j) { groups[j][i].delay = value; }));
+};
+d3_transitionPrototype.duration = function(value) {
+var groups = this;
+return groups.each(typeof value === "function"
+? function(d, i, j) { groups[j][i].duration = +value.apply(this, arguments); }
+: (value = +value, function(d, i, j) { groups[j][i].duration = value; }));
+};
+function d3_transition_each(callback) {
+for (var j = 0, m = this.length; j < m; j++) {
+for (var group = this[j], i = 0, n = group.length; i < n; i++) {
+var node = group[i];
+if (node) callback.call(node = node.node, node.__data__, i, j);
+}
+}
+return this;
+}
+d3_transitionPrototype.transition = function() {
+return this.select(d3_this);
+};
+var d3_timer_queue = null,
+d3_timer_interval, // is an interval (or frame) active?
+d3_timer_timeout; // is a timeout active?
+// The timer will continue to fire until callback returns true.
+d3.timer = function(callback, delay, then) {
+var found = false,
+t0,
+t1 = d3_timer_queue;
+if (arguments.length < 3) {
+if (arguments.length < 2) delay = 0;
+else if (!isFinite(delay)) return;
+then = Date.now();
+}
+// See if the callback's already in the queue.
+while (t1) {
+if (t1.callback === callback) {
+t1.then = then;
+t1.delay = delay;
+found = true;
+break;
+}
+t0 = t1;
+t1 = t1.next;
+}
+// Otherwise, add the callback to the queue.
+if (!found) d3_timer_queue = {
+callback: callback,
+then: then,
+delay: delay,
+next: d3_timer_queue
+};
+// Start animatin'!
+if (!d3_timer_interval) {
+d3_timer_timeout = clearTimeout(d3_timer_timeout);
+d3_timer_interval = 1;
+d3_timer_frame(d3_timer_step);
+}
+}
+function d3_timer_step() {
+var elapsed,
+now = Date.now(),
+t1 = d3_timer_queue;
+while (t1) {
+elapsed = now - t1.then;
+if (elapsed >= t1.delay) t1.flush = t1.callback(elapsed);
+t1 = t1.next;
+}
+var delay = d3_timer_flush() - now;
+if (delay > 24) {
+if (isFinite(delay)) {
+clearTimeout(d3_timer_timeout);
+d3_timer_timeout = setTimeout(d3_timer_step, delay);
+}
+d3_timer_interval = 0;
+} else {
+d3_timer_interval = 1;
+d3_timer_frame(d3_timer_step);
+}
+}
+d3.timer.flush = function() {
+var elapsed,
+now = Date.now(),
+t1 = d3_timer_queue;
+while (t1) {
+elapsed = now - t1.then;
+if (!t1.delay) t1.flush = t1.callback(elapsed);
+t1 = t1.next;
+}
+d3_timer_flush();
+};
+// Flush after callbacks, to avoid concurrent queue modification.
+function d3_timer_flush() {
+var t0 = null,
+t1 = d3_timer_queue,
+then = Infinity;
+while (t1) {
+if (t1.flush) {
+t1 = t0 ? t0.next = t1.next : d3_timer_queue = t1.next;
+} else {
+then = Math.min(then, t1.then + t1.delay);
+t1 = (t0 = t1).next;
+}
+}
+return then;
+}
+var d3_timer_frame = window.requestAnimationFrame
+|| window.webkitRequestAnimationFrame
+|| window.mozRequestAnimationFrame
+|| window.oRequestAnimationFrame
+|| window.msRequestAnimationFrame
+|| function(callback) { setTimeout(callback, 17); };
+d3.transform = function(string) {
+d3_transformG.setAttribute("transform", string);
+return new d3_transform(d3_transformG.transform.baseVal.consolidate().matrix);
+};
+// Compute x-scale and normalize the first row.
+// Compute shear and make second row orthogonal to first.
+// Compute y-scale and normalize the second row.
+// Finally, compute the rotation.
+function d3_transform(m) {
+var r0 = [m.a, m.b],
+r1 = [m.c, m.d],
+kx = d3_transformNormalize(r0),
+kz = d3_transformDot(r0, r1),
+ky = d3_transformNormalize(d3_transformCombine(r1, r0, -kz));
+this.translate = [m.e, m.f];
+this.rotate = Math.atan2(m.b, m.a) * d3_transformDegrees;
+this.scale = [kx, ky || 0];
+this.skew = ky ? kz / ky * d3_transformDegrees : 0;
+};
+d3_transform.prototype.toString = function() {
+return "translate(" + this.translate
++ ")rotate(" + this.rotate
++ ")skewX(" + this.skew
++ ")scale(" + this.scale
++ ")";
+};
+function d3_transformDot(a, b) {
+return a[0] * b[0] + a[1] * b[1];
+}
+function d3_transformNormalize(a) {
+var k = Math.sqrt(d3_transformDot(a, a));
+a[0] /= k;
+a[1] /= k;
+return k;
+}
+function d3_transformCombine(a, b, k) {
+a[0] += k * b[0];
+a[1] += k * b[1];
+return a;
+}
+var d3_transformG = document.createElementNS(d3.ns.prefix.svg, "g"),
+d3_transformDegrees = 180 / Math.PI;
+function d3_noop() {}
+d3.scale = {};
+function d3_scaleExtent(domain) {
+var start = domain[0], stop = domain[domain.length - 1];
+return start < stop ? [start, stop] : [stop, start];
+}
+function d3_scale_nice(domain, nice) {
+var i0 = 0,
+i1 = domain.length - 1,
+x0 = domain[i0],
+x1 = domain[i1],
+dx;
+if (x1 < x0) {
+dx = i0; i0 = i1; i1 = dx;
+dx = x0; x0 = x1; x1 = dx;
+}
+if (dx = x1 - x0) {
+nice = nice(dx);
+domain[i0] = nice.floor(x0);
+domain[i1] = nice.ceil(x1);
+}
+return domain;
+}
+function d3_scale_niceDefault() {
+return Math;
+}
+d3.scale.linear = function() {
+return d3_scale_linear([0, 1], [0, 1], d3.interpolate, false);
+};
+function d3_scale_linear(domain, range, interpolate, clamp) {
+var output,
+input;
+function rescale() {
+var linear = domain.length == 2 ? d3_scale_bilinear : d3_scale_polylinear,
+uninterpolate = clamp ? d3_uninterpolateClamp : d3_uninterpolateNumber;
+output = linear(domain, range, uninterpolate, interpolate);
+input = linear(range, domain, uninterpolate, d3.interpolate);
+return scale;
+}
+function scale(x) {
+return output(x);
+}
+// Note: requires range is coercible to number!
+scale.invert = function(y) {
+return input(y);
+};
+scale.domain = function(x) {
+if (!arguments.length) return domain;
+domain = x.map(Number);
+return rescale();
+};
+scale.range = function(x) {
+if (!arguments.length) return range;
+range = x;
+return rescale();
+};
+scale.rangeRound = function(x) {
+return scale.range(x).interpolate(d3.interpolateRound);
+};
+scale.clamp = function(x) {
+if (!arguments.length) return clamp;
+clamp = x;
+return rescale();
+};
+scale.interpolate = function(x) {
+if (!arguments.length) return interpolate;
+interpolate = x;
+return rescale();
+};
+scale.ticks = function(m) {
+return d3_scale_linearTicks(domain, m);
+};
+scale.tickFormat = function(m) {
+return d3_scale_linearTickFormat(domain, m);
+};
+scale.nice = function() {
+d3_scale_nice(domain, d3_scale_linearNice);
+return rescale();
+};
+scale.copy = function() {
+return d3_scale_linear(domain, range, interpolate, clamp);
+};
+return rescale();
+};
+function d3_scale_linearRebind(scale, linear) {
+scale.range = d3.rebind(scale, linear.range);
+scale.rangeRound = d3.rebind(scale, linear.rangeRound);
+scale.interpolate = d3.rebind(scale, linear.interpolate);
+scale.clamp = d3.rebind(scale, linear.clamp);
+return scale;
+}
+function d3_scale_linearNice(dx) {
+dx = Math.pow(10, Math.round(Math.log(dx) / Math.LN10) - 1);
+return {
+floor: function(x) { return Math.floor(x / dx) * dx; },
+ceil: function(x) { return Math.ceil(x / dx) * dx; }
+};
+}
+// TODO Dates? Ugh.
+function d3_scale_linearTickRange(domain, m) {
+var extent = d3_scaleExtent(domain),
+span = extent[1] - extent[0],
+step = Math.pow(10, Math.floor(Math.log(span / m) / Math.LN10)),
+err = m / span * step;
+// Filter ticks to get closer to the desired count.
+if (err <= .15) step *= 10;
+else if (err <= .35) step *= 5;
+else if (err <= .75) step *= 2;
+// Round start and stop values to step interval.
+extent[0] = Math.ceil(extent[0] / step) * step;
+extent[1] = Math.floor(extent[1] / step) * step + step * .5; // inclusive
+extent[2] = step;
+return extent;
+}
+function d3_scale_linearTicks(domain, m) {
+return d3.range.apply(d3, d3_scale_linearTickRange(domain, m));
+}
+function d3_scale_linearTickFormat(domain, m) {
+return d3.format(",." + Math.max(0, -Math.floor(Math.log(d3_scale_linearTickRange(domain, m)[2]) / Math.LN10 + .01)) + "f");
+}
+function d3_scale_bilinear(domain, range, uninterpolate, interpolate) {
+var u = uninterpolate(domain[0], domain[1]),
+i = interpolate(range[0], range[1]);
+return function(x) {
+return i(u(x));
+};
+}
+function d3_scale_polylinear(domain, range, uninterpolate, interpolate) {
+var u = [],
+i = [],
+j = 0,
+n = domain.length;
+while (++j < n) {
+u.push(uninterpolate(domain[j - 1], domain[j]));
+i.push(interpolate(range[j - 1], range[j]));
+}
+return function(x) {
+var j = d3.bisect(domain, x, 1, domain.length - 1) - 1;
+return i[j](u[j](x));
+};
+}
+d3.scale.log = function() {
+return d3_scale_log(d3.scale.linear(), d3_scale_logp);
+};
+function d3_scale_log(linear, log) {
+var pow = log.pow;
+function scale(x) {
+return linear(log(x));
+}
+scale.invert = function(x) {
+return pow(linear.invert(x));
+};
+scale.domain = function(x) {
+if (!arguments.length) return linear.domain().map(pow);
+log = x[0] < 0 ? d3_scale_logn : d3_scale_logp;
+pow = log.pow;
+linear.domain(x.map(log));
+return scale;
+};
+scale.nice = function() {
+linear.domain(d3_scale_nice(linear.domain(), d3_scale_niceDefault));
+return scale;
+};
+scale.ticks = function() {
+var extent = d3_scaleExtent(linear.domain()),
+ticks = [];
+if (extent.every(isFinite)) {
+var i = Math.floor(extent[0]),
+j = Math.ceil(extent[1]),
+u = Math.round(pow(extent[0])),
+v = Math.round(pow(extent[1]));
+if (log === d3_scale_logn) {
+ticks.push(pow(i));
+for (; i++ < j;) for (var k = 9; k > 0; k--) ticks.push(pow(i) * k);
+} else {
+for (; i < j; i++) for (var k = 1; k < 10; k++) ticks.push(pow(i) * k);
+ticks.push(pow(i));
+}
+for (i = 0; ticks[i] < u; i++) {} // strip small values
+for (j = ticks.length; ticks[j - 1] > v; j--) {} // strip big values
+ticks = ticks.slice(i, j);
+}
+return ticks;
+};
+scale.tickFormat = function(n, format) {
+if (arguments.length < 2) format = d3_scale_logFormat;
+if (arguments.length < 1) return format;
+var k = n / scale.ticks().length,
+f = log === d3_scale_logn ? (e = -1e-15, Math.floor) : (e = 1e-15, Math.ceil),
+e;
+return function(d) {
+return d / pow(f(log(d) + e)) < k ? format(d) : "";
+};
+};
+scale.copy = function() {
+return d3_scale_log(linear.copy(), log);
+};
+return d3_scale_linearRebind(scale, linear);
+};
+var d3_scale_logFormat = d3.format("e");
+function d3_scale_logp(x) {
+return Math.log(x) / Math.LN10;
+}
+function d3_scale_logn(x) {
+return -Math.log(-x) / Math.LN10;
+}
+d3_scale_logp.pow = function(x) {
+return Math.pow(10, x);
+};
+d3_scale_logn.pow = function(x) {
+return -Math.pow(10, -x);
+};
+d3.scale.pow = function() {
+return d3_scale_pow(d3.scale.linear(), 1);
+};
+function d3_scale_pow(linear, exponent) {
+var powp = d3_scale_powPow(exponent),
+powb = d3_scale_powPow(1 / exponent);
+function scale(x) {
+return linear(powp(x));
+}
+scale.invert = function(x) {
+return powb(linear.invert(x));
+};
+scale.domain = function(x) {
+if (!arguments.length) return linear.domain().map(powb);
+linear.domain(x.map(powp));
+return scale;
+};
+scale.ticks = function(m) {
+return d3_scale_linearTicks(scale.domain(), m);
+};
+scale.tickFormat = function(m) {
+return d3_scale_linearTickFormat(scale.domain(), m);
+};
+scale.nice = function() {
+return scale.domain(d3_scale_nice(scale.domain(), d3_scale_linearNice));
+};
+scale.exponent = function(x) {
+if (!arguments.length) return exponent;
+var domain = scale.domain();
+powp = d3_scale_powPow(exponent = x);
+powb = d3_scale_powPow(1 / exponent);
+return scale.domain(domain);
+};
+scale.copy = function() {
+return d3_scale_pow(linear.copy(), exponent);
+};
+return d3_scale_linearRebind(scale, linear);
+};
+function d3_scale_powPow(e) {
+return function(x) {
+return x < 0 ? -Math.pow(-x, e) : Math.pow(x, e);
+};
+}
+d3.scale.sqrt = function() {
+return d3.scale.pow().exponent(.5);
+};
+d3.scale.ordinal = function() {
+return d3_scale_ordinal([], {t: "range", x: []});
+};
+function d3_scale_ordinal(domain, ranger) {
+var index,
+range,
+rangeBand;
+function scale(x) {
+return range[((index[x] || (index[x] = domain.push(x))) - 1) % range.length];
+}
+function steps(start, step) {
+return d3.range(domain.length).map(function(i) { return start + step * i; });
+}
+scale.domain = function(x) {
+if (!arguments.length) return domain;
+domain = [];
+index = {};
+var i = -1, n = x.length, xi;
+while (++i < n) if (!index[xi = x[i]]) index[xi] = domain.push(xi);
+return scale[ranger.t](ranger.x, ranger.p);
+};
+scale.range = function(x) {
+if (!arguments.length) return range;
+range = x;
+rangeBand = 0;
+ranger = {t: "range", x: x};
+return scale;
+};
+scale.rangePoints = function(x, padding) {
+if (arguments.length < 2) padding = 0;
+var start = x[0],
+stop = x[1],
+step = (stop - start) / (domain.length - 1 + padding);
+range = steps(domain.length < 2 ? (start + stop) / 2 : start + step * padding / 2, step);
+rangeBand = 0;
+ranger = {t: "rangePoints", x: x, p: padding};
+return scale;
+};
+scale.rangeBands = function(x, padding) {
+if (arguments.length < 2) padding = 0;
+var start = x[0],
+stop = x[1],
+step = (stop - start) / (domain.length + padding);
+range = steps(start + step * padding, step);
+rangeBand = step * (1 - padding);
+ranger = {t: "rangeBands", x: x, p: padding};
+return scale;
+};
+scale.rangeRoundBands = function(x, padding) {
+if (arguments.length < 2) padding = 0;
+var start = x[0],
+stop = x[1],
+step = Math.floor((stop - start) / (domain.length + padding));
+range = steps(start + Math.round((stop - start - (domain.length - padding) * step) / 2), step);
+rangeBand = Math.round(step * (1 - padding));
+ranger = {t: "rangeRoundBands", x: x, p: padding};
+return scale;
+};
+scale.rangeBand = function() {
+return rangeBand;
+};
+scale.copy = function() {
+return d3_scale_ordinal(domain, ranger);
+};
+return scale.domain(domain);
+};
+/*
+* This product includes color specifications and designs developed by Cynthia
+* Brewer (http://colorbrewer.org/). See lib/colorbrewer for more information.
+*/
+d3.scale.category10 = function() {
+return d3.scale.ordinal().range(d3_category10);
+};
+d3.scale.category20 = function() {
+return d3.scale.ordinal().range(d3_category20);
+};
+d3.scale.category20b = function() {
+return d3.scale.ordinal().range(d3_category20b);
+};
+d3.scale.category20c = function() {
+return d3.scale.ordinal().range(d3_category20c);
+};
+var d3_category10 = [
+"#1f77b4", "#ff7f0e", "#2ca02c", "#d62728", "#9467bd",
+"#8c564b", "#e377c2", "#7f7f7f", "#bcbd22", "#17becf"
+];
+var d3_category20 = [
+"#1f77b4", "#aec7e8",
+"#ff7f0e", "#ffbb78",
+"#2ca02c", "#98df8a",
+"#d62728", "#ff9896",
+"#9467bd", "#c5b0d5",
+"#8c564b", "#c49c94",
+"#e377c2", "#f7b6d2",
+"#7f7f7f", "#c7c7c7",
+"#bcbd22", "#dbdb8d",
+"#17becf", "#9edae5"
+];
+var d3_category20b = [
+"#393b79", "#5254a3", "#6b6ecf", "#9c9ede",
+"#637939", "#8ca252", "#b5cf6b", "#cedb9c",
+"#8c6d31", "#bd9e39", "#e7ba52", "#e7cb94",
+"#843c39", "#ad494a", "#d6616b", "#e7969c",
+"#7b4173", "#a55194", "#ce6dbd", "#de9ed6"
+];
+var d3_category20c = [
+"#3182bd", "#6baed6", "#9ecae1", "#c6dbef",
+"#e6550d", "#fd8d3c", "#fdae6b", "#fdd0a2",
+"#31a354", "#74c476", "#a1d99b", "#c7e9c0",
+"#756bb1", "#9e9ac8", "#bcbddc", "#dadaeb",
+"#636363", "#969696", "#bdbdbd", "#d9d9d9"
+];
+d3.scale.quantile = function() {
+return d3_scale_quantile([], []);
+};
+function d3_scale_quantile(domain, range) {
+var thresholds;
+function rescale() {
+var k = 0,
+n = domain.length,
+q = range.length;
+thresholds = [];
+while (++k < q) thresholds[k - 1] = d3.quantile(domain, k / q);
+return scale;
+}
+function scale(x) {
+if (isNaN(x = +x)) return NaN;
+return range[d3.bisect(thresholds, x)];
+}
+scale.domain = function(x) {
+if (!arguments.length) return domain;
+domain = x.filter(function(d) { return !isNaN(d); }).sort(d3.ascending);
+return rescale();
+};
+scale.range = function(x) {
+if (!arguments.length) return range;
+range = x;
+return rescale();
+};
+scale.quantiles = function() {
+return thresholds;
+};
+scale.copy = function() {
+return d3_scale_quantile(domain, range); // copy on write!
+};
+return rescale();
+};
+d3.scale.quantize = function() {
+return d3_scale_quantize(0, 1, [0, 1]);
+};
+function d3_scale_quantize(x0, x1, range) {
+var kx, i;
+function scale(x) {
+return range[Math.max(0, Math.min(i, Math.floor(kx * (x - x0))))];
+}
+function rescale() {
+kx = range.length / (x1 - x0);
+i = range.length - 1;
+return scale;
+}
+scale.domain = function(x) {
+if (!arguments.length) return [x0, x1];
+x0 = +x[0];
+x1 = +x[x.length - 1];
+return rescale();
+};
+scale.range = function(x) {
+if (!arguments.length) return range;
+range = x;
+return rescale();
+};
+scale.copy = function() {
+return d3_scale_quantize(x0, x1, range); // copy on write
+};
+return rescale();
+};
+d3.svg = {};
+d3.svg.arc = function() {
+var innerRadius = d3_svg_arcInnerRadius,
+outerRadius = d3_svg_arcOuterRadius,
+startAngle = d3_svg_arcStartAngle,
+endAngle = d3_svg_arcEndAngle;
+function arc() {
+var r0 = innerRadius.apply(this, arguments),
+r1 = outerRadius.apply(this, arguments),
+a0 = startAngle.apply(this, arguments) + d3_svg_arcOffset,
+a1 = endAngle.apply(this, arguments) + d3_svg_arcOffset,
+da = (a1 < a0 && (da = a0, a0 = a1, a1 = da), a1 - a0),
+df = da < Math.PI ? "0" : "1",
+c0 = Math.cos(a0),
+s0 = Math.sin(a0),
+c1 = Math.cos(a1),
+s1 = Math.sin(a1);
+return da >= d3_svg_arcMax
+? (r0
+? "M0," + r1
++ "A" + r1 + "," + r1 + " 0 1,1 0," + (-r1)
++ "A" + r1 + "," + r1 + " 0 1,1 0," + r1
++ "M0," + r0
++ "A" + r0 + "," + r0 + " 0 1,0 0," + (-r0)
++ "A" + r0 + "," + r0 + " 0 1,0 0," + r0
++ "Z"
+: "M0," + r1
++ "A" + r1 + "," + r1 + " 0 1,1 0," + (-r1)
++ "A" + r1 + "," + r1 + " 0 1,1 0," + r1
++ "Z")
+: (r0
+? "M" + r1 * c0 + "," + r1 * s0
++ "A" + r1 + "," + r1 + " 0 " + df + ",1 " + r1 * c1 + "," + r1 * s1
++ "L" + r0 * c1 + "," + r0 * s1
++ "A" + r0 + "," + r0 + " 0 " + df + ",0 " + r0 * c0 + "," + r0 * s0
++ "Z"
+: "M" + r1 * c0 + "," + r1 * s0
++ "A" + r1 + "," + r1 + " 0 " + df + ",1 " + r1 * c1 + "," + r1 * s1
++ "L0,0"
++ "Z");
+}
+arc.innerRadius = function(v) {
+if (!arguments.length) return innerRadius;
+innerRadius = d3.functor(v);
+return arc;
+};
+arc.outerRadius = function(v) {
+if (!arguments.length) return outerRadius;
+outerRadius = d3.functor(v);
+return arc;
+};
+arc.startAngle = function(v) {
+if (!arguments.length) return startAngle;
+startAngle = d3.functor(v);
+return arc;
+};
+arc.endAngle = function(v) {
+if (!arguments.length) return endAngle;
+endAngle = d3.functor(v);
+return arc;
+};
+arc.centroid = function() {
+var r = (innerRadius.apply(this, arguments)
++ outerRadius.apply(this, arguments)) / 2,
+a = (startAngle.apply(this, arguments)
++ endAngle.apply(this, arguments)) / 2 + d3_svg_arcOffset;
+return [Math.cos(a) * r, Math.sin(a) * r];
+};
+return arc;
+};
+var d3_svg_arcOffset = -Math.PI / 2,
+d3_svg_arcMax = 2 * Math.PI - 1e-6;
+function d3_svg_arcInnerRadius(d) {
+return d.innerRadius;
+}
+function d3_svg_arcOuterRadius(d) {
+return d.outerRadius;
+}
+function d3_svg_arcStartAngle(d) {
+return d.startAngle;
+}
+function d3_svg_arcEndAngle(d) {
+return d.endAngle;
+}
+function d3_svg_line(projection) {
+var x = d3_svg_lineX,
+y = d3_svg_lineY,
+interpolate = "linear",
+interpolator = d3_svg_lineInterpolators[interpolate],
+tension = .7;
+function line(d) {
+return d.length < 1 ? null : "M" + interpolator(projection(d3_svg_linePoints(this, d, x, y)), tension);
+}
+line.x = function(v) {
+if (!arguments.length) return x;
+x = v;
+return line;
+};
+line.y = function(v) {
+if (!arguments.length) return y;
+y = v;
+return line;
+};
+line.interpolate = function(v) {
+if (!arguments.length) return interpolate;
+interpolator = d3_svg_lineInterpolators[interpolate = v];
+return line;
+};
+line.tension = function(v) {
+if (!arguments.length) return tension;
+tension = v;
+return line;
+};
+return line;
+}
+d3.svg.line = function() {
+return d3_svg_line(Object);
+};
+// Converts the specified array of data into an array of points
+// (x-y tuples), by evaluating the specified `x` and `y` functions on each
+// data point. The `this` context of the evaluated functions is the specified
+// "self" object; each function is passed the current datum and index.
+function d3_svg_linePoints(self, d, x, y) {
+var points = [],
+i = -1,
+n = d.length,
+fx = typeof x === "function",
+fy = typeof y === "function",
+value;
+if (fx && fy) {
+while (++i < n) points.push([
+x.call(self, value = d[i], i),
+y.call(self, value, i)
+]);
+} else if (fx) {
+while (++i < n) points.push([x.call(self, d[i], i), y]);
+} else if (fy) {
+while (++i < n) points.push([x, y.call(self, d[i], i)]);
+} else {
+while (++i < n) points.push([x, y]);
+}
+return points;
+}
+// The default `x` property, which references d[0].
+function d3_svg_lineX(d) {
+return d[0];
+}
+// The default `y` property, which references d[1].
+function d3_svg_lineY(d) {
+return d[1];
+}
+// The various interpolators supported by the `line` class.
+var d3_svg_lineInterpolators = {
+"linear": d3_svg_lineLinear,
+"step-before": d3_svg_lineStepBefore,
+"step-after": d3_svg_lineStepAfter,
+"basis": d3_svg_lineBasis,
+"basis-open": d3_svg_lineBasisOpen,
+"basis-closed": d3_svg_lineBasisClosed,
+"bundle": d3_svg_lineBundle,
+"cardinal": d3_svg_lineCardinal,
+"cardinal-open": d3_svg_lineCardinalOpen,
+"cardinal-closed": d3_svg_lineCardinalClosed,
+"monotone": d3_svg_lineMonotone
+};
+// Linear interpolation; generates "L" commands.
+function d3_svg_lineLinear(points) {
+var i = 0,
+n = points.length,
+p = points[0],
+path = [p[0], ",", p[1]];
+while (++i < n) path.push("L", (p = points[i])[0], ",", p[1]);
+return path.join("");
+}
+// Step interpolation; generates "H" and "V" commands.
+function d3_svg_lineStepBefore(points) {
+var i = 0,
+n = points.length,
+p = points[0],
+path = [p[0], ",", p[1]];
+while (++i < n) path.push("V", (p = points[i])[1], "H", p[0]);
+return path.join("");
+}
+// Step interpolation; generates "H" and "V" commands.
+function d3_svg_lineStepAfter(points) {
+var i = 0,
+n = points.length,
+p = points[0],
+path = [p[0], ",", p[1]];
+while (++i < n) path.push("H", (p = points[i])[0], "V", p[1]);
+return path.join("");
+}
+// Open cardinal spline interpolation; generates "C" commands.
+function d3_svg_lineCardinalOpen(points, tension) {
+return points.length < 4
+? d3_svg_lineLinear(points)
+: points[1] + d3_svg_lineHermite(points.slice(1, points.length - 1),
+d3_svg_lineCardinalTangents(points, tension));
+}
+// Closed cardinal spline interpolation; generates "C" commands.
+function d3_svg_lineCardinalClosed(points, tension) {
+return points.length < 3
+? d3_svg_lineLinear(points)
+: points[0] + d3_svg_lineHermite((points.push(points[0]), points),
+d3_svg_lineCardinalTangents([points[points.length - 2]]
+.concat(points, [points[1]]), tension));
+}
+// Cardinal spline interpolation; generates "C" commands.
+function d3_svg_lineCardinal(points, tension, closed) {
+return points.length < 3
+? d3_svg_lineLinear(points)
+: points[0] + d3_svg_lineHermite(points,
+d3_svg_lineCardinalTangents(points, tension));
+}
+// Hermite spline construction; generates "C" commands.
+function d3_svg_lineHermite(points, tangents) {
+if (tangents.length < 1
+|| (points.length != tangents.length
+&& points.length != tangents.length + 2)) {
+return d3_svg_lineLinear(points);
+}
+var quad = points.length != tangents.length,
+path = "",
+p0 = points[0],
+p = points[1],
+t0 = tangents[0],
+t = t0,
+pi = 1;
+if (quad) {
+path += "Q" + (p[0] - t0[0] * 2 / 3) + "," + (p[1] - t0[1] * 2 / 3)
++ "," + p[0] + "," + p[1];
+p0 = points[1];
+pi = 2;
+}
+if (tangents.length > 1) {
+t = tangents[1];
+p = points[pi];
+pi++;
+path += "C" + (p0[0] + t0[0]) + "," + (p0[1] + t0[1])
++ "," + (p[0] - t[0]) + "," + (p[1] - t[1])
++ "," + p[0] + "," + p[1];
+for (var i = 2; i < tangents.length; i++, pi++) {
+p = points[pi];
+t = tangents[i];
+path += "S" + (p[0] - t[0]) + "," + (p[1] - t[1])
++ "," + p[0] + "," + p[1];
+}
+}
+if (quad) {
+var lp = points[pi];
+path += "Q" + (p[0] + t[0] * 2 / 3) + "," + (p[1] + t[1] * 2 / 3)
++ "," + lp[0] + "," + lp[1];
+}
+return path;
+}
+// Generates tangents for a cardinal spline.
+function d3_svg_lineCardinalTangents(points, tension) {
+var tangents = [],
+a = (1 - tension) / 2,
+p0,
+p1 = points[0],
+p2 = points[1],
+i = 1,
+n = points.length;
+while (++i < n) {
+p0 = p1;
+p1 = p2;
+p2 = points[i];
+tangents.push([a * (p2[0] - p0[0]), a * (p2[1] - p0[1])]);
+}
+return tangents;
+}
+// B-spline interpolation; generates "C" commands.
+function d3_svg_lineBasis(points) {
+if (points.length < 3) return d3_svg_lineLinear(points);
+var i = 1,
+n = points.length,
+pi = points[0],
+x0 = pi[0],
+y0 = pi[1],
+px = [x0, x0, x0, (pi = points[1])[0]],
+py = [y0, y0, y0, pi[1]],
+path = [x0, ",", y0];
+d3_svg_lineBasisBezier(path, px, py);
+while (++i < n) {
+pi = points[i];
+px.shift(); px.push(pi[0]);
+py.shift(); py.push(pi[1]);
+d3_svg_lineBasisBezier(path, px, py);
+}
+i = -1;
+while (++i < 2) {
+px.shift(); px.push(pi[0]);
+py.shift(); py.push(pi[1]);
+d3_svg_lineBasisBezier(path, px, py);
+}
+return path.join("");
+}
+// Open B-spline interpolation; generates "C" commands.
+function d3_svg_lineBasisOpen(points) {
+if (points.length < 4) return d3_svg_lineLinear(points);
+var path = [],
+i = -1,
+n = points.length,
+pi,
+px = [0],
+py = [0];
+while (++i < 3) {
+pi = points[i];
+px.push(pi[0]);
+py.push(pi[1]);
+}
+path.push(d3_svg_lineDot4(d3_svg_lineBasisBezier3, px)
++ "," + d3_svg_lineDot4(d3_svg_lineBasisBezier3, py));
+--i; while (++i < n) {
+pi = points[i];
+px.shift(); px.push(pi[0]);
+py.shift(); py.push(pi[1]);
+d3_svg_lineBasisBezier(path, px, py);
+}
+return path.join("");
+}
+// Closed B-spline interpolation; generates "C" commands.
+function d3_svg_lineBasisClosed(points) {
+var path,
+i = -1,
+n = points.length,
+m = n + 4,
+pi,
+px = [],
+py = [];
+while (++i < 4) {
+pi = points[i % n];
+px.push(pi[0]);
+py.push(pi[1]);
+}
+path = [
+d3_svg_lineDot4(d3_svg_lineBasisBezier3, px), ",",
+d3_svg_lineDot4(d3_svg_lineBasisBezier3, py)
+];
+--i; while (++i < m) {
+pi = points[i % n];
+px.shift(); px.push(pi[0]);
+py.shift(); py.push(pi[1]);
+d3_svg_lineBasisBezier(path, px, py);
+}
+return path.join("");
+}
+function d3_svg_lineBundle(points, tension) {
+var n = points.length - 1,
+x0 = points[0][0],
+y0 = points[0][1],
+dx = points[n][0] - x0,
+dy = points[n][1] - y0,
+i = -1,
+p,
+t;
+while (++i <= n) {
+p = points[i];
+t = i / n;
+p[0] = tension * p[0] + (1 - tension) * (x0 + t * dx);
+p[1] = tension * p[1] + (1 - tension) * (y0 + t * dy);
+}
+return d3_svg_lineBasis(points);
+}
+// Returns the dot product of the given four-element vectors.
+function d3_svg_lineDot4(a, b) {
+return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
+}
+// Matrix to transform basis (b-spline) control points to bezier
+// control points. Derived from FvD 11.2.8.
+var d3_svg_lineBasisBezier1 = [0, 2/3, 1/3, 0],
+d3_svg_lineBasisBezier2 = [0, 1/3, 2/3, 0],
+d3_svg_lineBasisBezier3 = [0, 1/6, 2/3, 1/6];
+// Pushes a "C" Bézier curve onto the specified path array, given the
+// two specified four-element arrays which define the control points.
+function d3_svg_lineBasisBezier(path, x, y) {
+path.push(
+"C", d3_svg_lineDot4(d3_svg_lineBasisBezier1, x),
+",", d3_svg_lineDot4(d3_svg_lineBasisBezier1, y),
+",", d3_svg_lineDot4(d3_svg_lineBasisBezier2, x),
+",", d3_svg_lineDot4(d3_svg_lineBasisBezier2, y),
+",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, x),
+",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, y));
+}
+// Computes the slope from points p0 to p1.
+function d3_svg_lineSlope(p0, p1) {
+return (p1[1] - p0[1]) / (p1[0] - p0[0]);
+}
+// Compute three-point differences for the given points.
+// http://en.wikipedia.org/wiki/Cubic_Hermite_spline#Finite_difference
+function d3_svg_lineFiniteDifferences(points) {
+var i = 0,
+j = points.length - 1,
+m = [],
+p0 = points[0],
+p1 = points[1],
+d = m[0] = d3_svg_lineSlope(p0, p1);
+while (++i < j) {
+m[i] = d + (d = d3_svg_lineSlope(p0 = p1, p1 = points[i + 1]));
+}
+m[i] = d;
+return m;
+}
+// Interpolates the given points using Fritsch-Carlson Monotone cubic Hermite
+// interpolation. Returns an array of tangent vectors. For details, see
+// http://en.wikipedia.org/wiki/Monotone_cubic_interpolation
+function d3_svg_lineMonotoneTangents(points) {
+var tangents = [],
+d,
+a,
+b,
+s,
+m = d3_svg_lineFiniteDifferences(points),
+i = -1,
+j = points.length - 1;
+// The first two steps are done by computing finite-differences:
+// 1. Compute the slopes of the secant lines between successive points.
+// 2. Initialize the tangents at every point as the average of the secants.
+// Then, for each segment…
+while (++i < j) {
+d = d3_svg_lineSlope(points[i], points[i + 1]);
+// 3. If two successive yk = y{k + 1} are equal (i.e., d is zero), then set
+// mk = m{k + 1} = 0 as the spline connecting these points must be flat to
+// preserve monotonicity. Ignore step 4 and 5 for those k.
+if (Math.abs(d) < 1e-6) {
+m[i] = m[i + 1] = 0;
+} else {
+// 4. Let ak = mk / dk and bk = m{k + 1} / dk.
+a = m[i] / d;
+b = m[i + 1] / d;
+// 5. Prevent overshoot and ensure monotonicity by restricting the
+// magnitude of vector <ak, bk> to a circle of radius 3.
+s = a * a + b * b;
+if (s > 9) {
+s = d * 3 / Math.sqrt(s);
+m[i] = s * a;
+m[i + 1] = s * b;
+}
+}
+}
+// Compute the normalized tangent vector from the slopes. Note that if x is
+// not monotonic, it's possible that the slope will be infinite, so we
+	// protect
+// against NaN by setting the coordinate to zero.
+i = -1; while (++i <= j) {
+s = (points[Math.min(j, i + 1)][0] - points[Math.max(0, i - 1)][0])
+/ (6 * (1 + m[i] * m[i]));
+tangents.push([s || 0, m[i] * s || 0]);
+}
+return tangents;
+}
+function d3_svg_lineMonotone(points) {
+return points.length < 3
+? d3_svg_lineLinear(points)
+: points[0] +
+d3_svg_lineHermite(points, d3_svg_lineMonotoneTangents(points));
+}
+d3.svg.line.radial = function() {
+var line = d3_svg_line(d3_svg_lineRadial);
+line.radius = line.x, delete line.x;
+line.angle = line.y, delete line.y;
+return line;
+};
+function d3_svg_lineRadial(points) {
+var point,
+i = -1,
+n = points.length,
+r,
+a;
+while (++i < n) {
+point = points[i];
+r = point[0];
+a = point[1] + d3_svg_arcOffset;
+point[0] = r * Math.cos(a);
+point[1] = r * Math.sin(a);
+}
+return points;
+}
+function d3_svg_area(projection) {
+var x0 = d3_svg_lineX,
+x1 = d3_svg_lineX,
+y0 = 0,
+y1 = d3_svg_lineY,
+interpolate,
+i0,
+i1,
+tension = .7;
+function area(d) {
+if (d.length < 1) return null;
+var points0 = d3_svg_linePoints(this, d, x0, y0),
+points1 = d3_svg_linePoints(this, d, x0 === x1 ? d3_svg_areaX(points0) : x1, y0 === y1 ? d3_svg_areaY(points0) : y1);
+return "M" + i0(projection(points1), tension)
++ "L" + i1(projection(points0.reverse()), tension)
++ "Z";
+}
+area.x = function(x) {
+if (!arguments.length) return x1;
+x0 = x1 = x;
+return area;
+};
+area.x0 = function(x) {
+if (!arguments.length) return x0;
+x0 = x;
+return area;
+};
+area.x1 = function(x) {
+if (!arguments.length) return x1;
+x1 = x;
+return area;
+};
+area.y = function(y) {
+if (!arguments.length) return y1;
+y0 = y1 = y;
+return area;
+};
+area.y0 = function(y) {
+if (!arguments.length) return y0;
+y0 = y;
+return area;
+};
+area.y1 = function(y) {
+if (!arguments.length) return y1;
+y1 = y;
+return area;
+};
+area.interpolate = function(x) {
+if (!arguments.length) return interpolate;
+i0 = d3_svg_lineInterpolators[interpolate = x];
+i1 = i0.reverse || i0;
+return area;
+};
+area.tension = function(x) {
+if (!arguments.length) return tension;
+tension = x;
+return area;
+};
+return area.interpolate("linear");
+}
+d3_svg_lineStepBefore.reverse = d3_svg_lineStepAfter;
+d3_svg_lineStepAfter.reverse = d3_svg_lineStepBefore;
+d3.svg.area = function() {
+return d3_svg_area(Object);
+};
+function d3_svg_areaX(points) {
+return function(d, i) {
+return points[i][0];
+};
+}
+function d3_svg_areaY(points) {
+return function(d, i) {
+return points[i][1];
+};
+}
+d3.svg.area.radial = function() {
+var area = d3_svg_area(d3_svg_lineRadial);
+area.radius = area.x, delete area.x;
+area.innerRadius = area.x0, delete area.x0;
+area.outerRadius = area.x1, delete area.x1;
+area.angle = area.y, delete area.y;
+area.startAngle = area.y0, delete area.y0;
+area.endAngle = area.y1, delete area.y1;
+return area;
+};
+d3.svg.chord = function() {
+var source = d3_svg_chordSource,
+target = d3_svg_chordTarget,
+radius = d3_svg_chordRadius,
+startAngle = d3_svg_arcStartAngle,
+endAngle = d3_svg_arcEndAngle;
+// TODO Allow control point to be customized.
+function chord(d, i) {
+var s = subgroup(this, source, d, i),
+t = subgroup(this, target, d, i);
+return "M" + s.p0
++ arc(s.r, s.p1) + (equals(s, t)
+? curve(s.r, s.p1, s.r, s.p0)
+: curve(s.r, s.p1, t.r, t.p0)
++ arc(t.r, t.p1)
++ curve(t.r, t.p1, s.r, s.p0))
++ "Z";
+}
+function subgroup(self, f, d, i) {
+var subgroup = f.call(self, d, i),
+r = radius.call(self, subgroup, i),
+a0 = startAngle.call(self, subgroup, i) + d3_svg_arcOffset,
+a1 = endAngle.call(self, subgroup, i) + d3_svg_arcOffset;
+return {
+r: r,
+a0: a0,
+a1: a1,
+p0: [r * Math.cos(a0), r * Math.sin(a0)],
+p1: [r * Math.cos(a1), r * Math.sin(a1)]
+};
+}
+function equals(a, b) {
+return a.a0 == b.a0 && a.a1 == b.a1;
+}
+function arc(r, p) {
+return "A" + r + "," + r + " 0 0,1 " + p;
+}
+function curve(r0, p0, r1, p1) {
+return "Q 0,0 " + p1;
+}
+chord.radius = function(v) {
+if (!arguments.length) return radius;
+radius = d3.functor(v);
+return chord;
+};
+chord.source = function(v) {
+if (!arguments.length) return source;
+source = d3.functor(v);
+return chord;
+};
+chord.target = function(v) {
+if (!arguments.length) return target;
+target = d3.functor(v);
+return chord;
+};
+chord.startAngle = function(v) {
+if (!arguments.length) return startAngle;
+startAngle = d3.functor(v);
+return chord;
+};
+chord.endAngle = function(v) {
+if (!arguments.length) return endAngle;
+endAngle = d3.functor(v);
+return chord;
+};
+return chord;
+};
+function d3_svg_chordSource(d) {
+return d.source;
+}
+function d3_svg_chordTarget(d) {
+return d.target;
+}
+function d3_svg_chordRadius(d) {
+return d.radius;
+}
+function d3_svg_chordStartAngle(d) {
+return d.startAngle;
+}
+function d3_svg_chordEndAngle(d) {
+return d.endAngle;
+}
+d3.svg.diagonal = function() {
+var source = d3_svg_chordSource,
+target = d3_svg_chordTarget,
+projection = d3_svg_diagonalProjection;
+function diagonal(d, i) {
+var p0 = source.call(this, d, i),
+p3 = target.call(this, d, i),
+m = (p0.y + p3.y) / 2,
+p = [p0, {x: p0.x, y: m}, {x: p3.x, y: m}, p3];
+p = p.map(projection);
+return "M" + p[0] + "C" + p[1] + " " + p[2] + " " + p[3];
+}
+diagonal.source = function(x) {
+if (!arguments.length) return source;
+source = d3.functor(x);
+return diagonal;
+};
+diagonal.target = function(x) {
+if (!arguments.length) return target;
+target = d3.functor(x);
+return diagonal;
+};
+diagonal.projection = function(x) {
+if (!arguments.length) return projection;
+projection = x;
+return diagonal;
+};
+return diagonal;
+};
+function d3_svg_diagonalProjection(d) {
+return [d.x, d.y];
+}
+d3.svg.diagonal.radial = function() {
+var diagonal = d3.svg.diagonal(),
+projection = d3_svg_diagonalProjection,
+projection_ = diagonal.projection;
+diagonal.projection = function(x) {
+return arguments.length
+? projection_(d3_svg_diagonalRadialProjection(projection = x))
+: projection;
+};
+return diagonal;
+};
+function d3_svg_diagonalRadialProjection(projection) {
+return function() {
+var d = projection.apply(this, arguments),
+r = d[0],
+a = d[1] + d3_svg_arcOffset;
+return [r * Math.cos(a), r * Math.sin(a)];
+};
+}
+d3.svg.mouse = function(container) {
+return d3_svg_mousePoint(container, d3.event);
+};
+// https://bugs.webkit.org/show_bug.cgi?id=44083
+var d3_mouse_bug44083 = /WebKit/.test(navigator.userAgent) ? -1 : 0;
+function d3_svg_mousePoint(container, e) {
+var point = (container.ownerSVGElement || container).createSVGPoint();
+if ((d3_mouse_bug44083 < 0) && (window.scrollX || window.scrollY)) {
+var svg = d3.select(document.body)
+.append("svg:svg")
+.style("position", "absolute")
+.style("top", 0)
+.style("left", 0);
+var ctm = svg[0][0].getScreenCTM();
+d3_mouse_bug44083 = !(ctm.f || ctm.e);
+svg.remove();
+}
+if (d3_mouse_bug44083) {
+point.x = e.pageX;
+point.y = e.pageY;
+} else {
+point.x = e.clientX;
+point.y = e.clientY;
+}
+point = point.matrixTransform(container.getScreenCTM().inverse());
+return [point.x, point.y];
+};
+d3.svg.touches = function(container, touches) {
+if (arguments.length < 2) touches = d3.event.touches;
+return touches ? d3_array(touches).map(function(touch) {
+var point = d3_svg_mousePoint(container, touch);
+point.identifier = touch.identifier;
+return point;
+}) : [];
+};
+d3.svg.symbol = function() {
+var type = d3_svg_symbolType,
+size = d3_svg_symbolSize;
+function symbol(d, i) {
+return (d3_svg_symbols[type.call(this, d, i)]
+|| d3_svg_symbols.circle)
+(size.call(this, d, i));
+}
+symbol.type = function(x) {
+if (!arguments.length) return type;
+type = d3.functor(x);
+return symbol;
+};
+// size of symbol in square pixels
+symbol.size = function(x) {
+if (!arguments.length) return size;
+size = d3.functor(x);
+return symbol;
+};
+return symbol;
+};
+function d3_svg_symbolSize() {
+return 64;
+}
+function d3_svg_symbolType() {
+return "circle";
+}
+// TODO cross-diagonal?
+var d3_svg_symbols = {
+"circle": function(size) {
+var r = Math.sqrt(size / Math.PI);
+return "M0," + r
++ "A" + r + "," + r + " 0 1,1 0," + (-r)
++ "A" + r + "," + r + " 0 1,1 0," + r
++ "Z";
+},
+"cross": function(size) {
+var r = Math.sqrt(size / 5) / 2;
+return "M" + -3 * r + "," + -r
++ "H" + -r
++ "V" + -3 * r
++ "H" + r
++ "V" + -r
++ "H" + 3 * r
++ "V" + r
++ "H" + r
++ "V" + 3 * r
++ "H" + -r
++ "V" + r
++ "H" + -3 * r
++ "Z";
+},
+"diamond": function(size) {
+var ry = Math.sqrt(size / (2 * d3_svg_symbolTan30)),
+rx = ry * d3_svg_symbolTan30;
+return "M0," + -ry
++ "L" + rx + ",0"
++ " 0," + ry
++ " " + -rx + ",0"
++ "Z";
+},
+"square": function(size) {
+var r = Math.sqrt(size) / 2;
+return "M" + -r + "," + -r
++ "L" + r + "," + -r
++ " " + r + "," + r
++ " " + -r + "," + r
++ "Z";
+},
+"triangle-down": function(size) {
+var rx = Math.sqrt(size / d3_svg_symbolSqrt3),
+ry = rx * d3_svg_symbolSqrt3 / 2;
+return "M0," + ry
++ "L" + rx +"," + -ry
++ " " + -rx + "," + -ry
++ "Z";
+},
+"triangle-up": function(size) {
+var rx = Math.sqrt(size / d3_svg_symbolSqrt3),
+ry = rx * d3_svg_symbolSqrt3 / 2;
+return "M0," + -ry
++ "L" + rx +"," + ry
++ " " + -rx + "," + ry
++ "Z";
+}
+};
+d3.svg.symbolTypes = d3.keys(d3_svg_symbols);
+var d3_svg_symbolSqrt3 = Math.sqrt(3),
+d3_svg_symbolTan30 = Math.tan(30 * Math.PI / 180);
+d3.svg.axis = function() {
+var scale = d3.scale.linear(),
+orient = "bottom",
+tickMajorSize = 6,
+tickMinorSize = 6,
+tickEndSize = 6,
+tickPadding = 3,
+tickArguments_ = [10],
+tickFormat_,
+tickSubdivide = 0;
+function axis(selection) {
+selection.each(function(d, i, j) {
+var g = d3.select(this);
+// If selection is a transition, create subtransitions.
+var transition = selection.delay ? function(o) {
+var id = d3_transitionInheritId;
+try {
+d3_transitionInheritId = selection.id;
+return o.transition()
+.delay(selection[j][i].delay)
+.duration(selection[j][i].duration)
+.ease(selection.ease());
+} finally {
+d3_transitionInheritId = id;
+}
+} : Object;
+// Ticks.
+var ticks = scale.ticks.apply(scale, tickArguments_),
+tickFormat = tickFormat_ == null ? scale.tickFormat.apply(scale, tickArguments_) : tickFormat_;
+// Minor ticks.
+var subticks = d3_svg_axisSubdivide(scale, ticks, tickSubdivide),
+subtick = g.selectAll(".minor").data(subticks, String),
+subtickEnter = subtick.enter().insert("svg:line", "g").attr("class", "tick minor").style("opacity", 1e-6),
+subtickExit = transition(subtick.exit()).style("opacity", 1e-6).remove(),
+subtickUpdate = transition(subtick).style("opacity", 1);
+// Major ticks.
+var tick = g.selectAll("g").data(ticks, String),
+tickEnter = tick.enter().insert("svg:g", "path").style("opacity", 1e-6),
+tickExit = transition(tick.exit()).style("opacity", 1e-6).remove(),
+tickUpdate = transition(tick).style("opacity", 1),
+tickTransform;
+// Domain.
+var range = d3_scaleExtent(scale.range()),
+path = g.selectAll(".domain").data([0]),
+pathEnter = path.enter().append("svg:path").attr("class", "domain"),
+pathUpdate = transition(path);
+// Stash the new scale and grab the old scale.
+var scale0 = this.__chart__ || scale;
+this.__chart__ = scale.copy();
+tickEnter.append("svg:line").attr("class", "tick");
+tickEnter.append("svg:text");
+tickUpdate.select("text").text(tickFormat);
+switch (orient) {
+case "bottom": {
+tickTransform = d3_svg_axisX;
+subtickUpdate.attr("x2", 0).attr("y2", tickMinorSize);
+tickUpdate.select("line").attr("x2", 0).attr("y2", tickMajorSize);
+tickUpdate.select("text").attr("x", 0).attr("y", Math.max(tickMajorSize, 0) + tickPadding).attr("dy", ".71em").attr("text-anchor", "middle");
+pathUpdate.attr("d", "M" + range[0] + "," + tickEndSize + "V0H" + range[1] + "V" + tickEndSize);
+break;
+}
+case "top": {
+tickTransform = d3_svg_axisX;
+subtickUpdate.attr("x2", 0).attr("y2", -tickMinorSize);
+tickUpdate.select("line").attr("x2", 0).attr("y2", -tickMajorSize);
+tickUpdate.select("text").attr("x", 0).attr("y", -(Math.max(tickMajorSize, 0) + tickPadding)).attr("dy", "0em").attr("text-anchor", "middle");
+pathUpdate.attr("d", "M" + range[0] + "," + -tickEndSize + "V0H" + range[1] + "V" + -tickEndSize);
+break;
+}
+case "left": {
+tickTransform = d3_svg_axisY;
+subtickUpdate.attr("x2", -tickMinorSize).attr("y2", 0);
+tickUpdate.select("line").attr("x2", -tickMajorSize).attr("y2", 0);
+tickUpdate.select("text").attr("x", -(Math.max(tickMajorSize, 0) + tickPadding)).attr("y", 0).attr("dy", ".32em").attr("text-anchor", "end");
+pathUpdate.attr("d", "M" + -tickEndSize + "," + range[0] + "H0V" + range[1] + "H" + -tickEndSize);
+break;
+}
+case "right": {
+tickTransform = d3_svg_axisY;
+subtickUpdate.attr("x2", tickMinorSize).attr("y2", 0);
+tickUpdate.select("line").attr("x2", tickMajorSize).attr("y2", 0);
+tickUpdate.select("text").attr("x", Math.max(tickMajorSize, 0) + tickPadding).attr("y", 0).attr("dy", ".32em").attr("text-anchor", "start");
+pathUpdate.attr("d", "M" + tickEndSize + "," + range[0] + "H0V" + range[1] + "H" + tickEndSize);
+break;
+}
+}
+tickEnter.call(tickTransform, scale0);
+tickUpdate.call(tickTransform, scale);
+tickExit.call(tickTransform, scale);
+subtickEnter.call(tickTransform, scale0);
+subtickUpdate.call(tickTransform, scale);
+subtickExit.call(tickTransform, scale);
+});
+}
+axis.scale = function(x) {
+if (!arguments.length) return scale;
+scale = x;
+return axis;
+};
+axis.orient = function(x) {
+if (!arguments.length) return orient;
+orient = x;
+return axis;
+};
+axis.ticks = function() {
+if (!arguments.length) return tickArguments_;
+tickArguments_ = arguments;
+return axis;
+};
+axis.tickFormat = function(x) {
+if (!arguments.length) return tickFormat_;
+tickFormat_ = x;
+return axis;
+};
+axis.tickSize = function(x, y, z) {
+if (!arguments.length) return tickMajorSize;
+var n = arguments.length - 1;
+tickMajorSize = +x;
+tickMinorSize = n > 1 ? +y : tickMajorSize;
+tickEndSize = n > 0 ? +arguments[n] : tickMajorSize;
+return axis;
+};
+axis.tickPadding = function(x) {
+if (!arguments.length) return tickPadding;
+tickPadding = +x;
+return axis;
+};
+axis.tickSubdivide = function(x) {
+if (!arguments.length) return tickSubdivide;
+tickSubdivide = +x;
+return axis;
+};
+return axis;
+};
+function d3_svg_axisX(selection, x) {
+selection.attr("transform", function(d) { return "translate(" + x(d) + ",0)"; });
+}
+function d3_svg_axisY(selection, y) {
+selection.attr("transform", function(d) { return "translate(0," + y(d) + ")"; });
+}
+function d3_svg_axisSubdivide(scale, ticks, m) {
+subticks = [];
+if (m && ticks.length > 1) {
+var extent = d3_scaleExtent(scale.domain()),
+subticks,
+i = -1,
+n = ticks.length,
+d = (ticks[1] - ticks[0]) / ++m,
+j,
+v;
+while (++i < n) {
+for (j = m; --j > 0;) {
+if ((v = +ticks[i] - j * d) >= extent[0]) {
+subticks.push(v);
+}
+}
+}
+for (--i, j = 0; ++j < m && (v = +ticks[i] + j * d) < extent[1];) {
+subticks.push(v);
+}
+}
+return subticks;
+}
+d3.svg.brush = function() {
+var event = d3.dispatch("brushstart", "brush", "brushend"),
+x, // x-scale, optional
+y, // y-scale, optional
+extent = [[0, 0], [0, 0]]; // [x0, y0], [x1, y1]
+function brush(g) {
+var resizes = x && y ? ["n", "e", "s", "w", "nw", "ne", "se", "sw"]
+: x ? ["e", "w"]
+: y ? ["n", "s"]
+: [];
+g.each(function() {
+var g = d3.select(this).on("mousedown.brush", down),
+bg = g.selectAll(".background").data([,]),
+fg = g.selectAll(".extent").data([,]),
+tz = g.selectAll(".resize").data(resizes, String),
+e;
+// An invisible, mouseable area for starting a new brush.
+bg.enter().append("svg:rect")
+.attr("class", "background")
+.style("visibility", "hidden")
+.style("pointer-events", "all")
+.style("cursor", "crosshair");
+// The visible brush extent; style this as you like!
+fg.enter().append("svg:rect")
+.attr("class", "extent")
+.style("cursor", "move");
+// More invisible rects for resizing the extent.
+tz.enter().append("svg:rect")
+.attr("class", function(d) { return "resize " + d; })
+.attr("width", 6)
+.attr("height", 6)
+.style("visibility", "hidden")
+.style("pointer-events", brush.empty() ? "none" : "all")
+.style("cursor", function(d) { return d3_svg_brushCursor[d]; });
+// Remove any superfluous resizers.
+tz.exit().remove();
+// Initialize the background to fill the defined range.
+// If the range isn't defined, you can post-process.
+if (x) {
+e = d3_scaleExtent(x.range());
+bg.attr("x", e[0]).attr("width", e[1] - e[0]);
+d3_svg_brushRedrawX(g, extent);
+}
+if (y) {
+e = d3_scaleExtent(y.range());
+bg.attr("y", e[0]).attr("height", e[1] - e[0]);
+d3_svg_brushRedrawY(g, extent);
+}
+});
+}
+function down() {
+var target = d3.select(d3.event.target);
+// Store some global state for the duration of the brush gesture.
+d3_svg_brush = brush;
+d3_svg_brushTarget = this;
+d3_svg_brushExtent = extent;
+d3_svg_brushOffset = d3.svg.mouse(d3_svg_brushTarget);
+// If the extent was clicked on, drag rather than brush;
+// store the offset between the mouse and extent origin instead.
+if (d3_svg_brushDrag = target.classed("extent")) {
+d3_svg_brushOffset[0] = extent[0][0] - d3_svg_brushOffset[0];
+d3_svg_brushOffset[1] = extent[0][1] - d3_svg_brushOffset[1];
+}
+// If a resizer was clicked on, record which side is to be resized.
+// Also, set the offset to the opposite side.
+else if (target.classed("resize")) {
+d3_svg_brushResize = d3.event.target.__data__;
+d3_svg_brushOffset[0] = extent[+/w$/.test(d3_svg_brushResize)][0];
+d3_svg_brushOffset[1] = extent[+/^n/.test(d3_svg_brushResize)][1];
+}
+// If the ALT key is down when starting a brush, the center is at the mouse.
+else if (d3.event.altKey) {
+d3_svg_brushCenter = d3_svg_brushOffset.slice();
+}
+// Restrict which dimensions are resized.
+d3_svg_brushX = !/^(n|s)$/.test(d3_svg_brushResize) && x;
+d3_svg_brushY = !/^(e|w)$/.test(d3_svg_brushResize) && y;
+// Notify listeners.
+d3_svg_brushDispatch = dispatcher(this, arguments);
+d3_svg_brushDispatch("brushstart");
+d3_svg_brushMove();
+d3_eventCancel();
+}
+function dispatcher(that, argumentz) {
+return function(type) {
+var e = d3.event;
+try {
+d3.event = {type: type, target: brush};
+event[type].apply(that, argumentz);
+} finally {
+d3.event = e;
+}
+};
+}
+brush.x = function(z) {
+if (!arguments.length) return x;
+x = z;
+return brush;
+};
+brush.y = function(z) {
+if (!arguments.length) return y;
+y = z;
+return brush;
+};
+brush.extent = function(z) {
+var x0, x1, y0, y1, t;
+// Invert the pixel extent to data-space.
+if (!arguments.length) {
+if (x) {
+x0 = x.invert(extent[0][0]), x1 = x.invert(extent[1][0]);
+if (x1 < x0) t = x0, x0 = x1, x1 = t;
+}
+if (y) {
+y0 = y.invert(extent[0][1]), y1 = y.invert(extent[1][1]);
+if (y1 < y0) t = y0, y0 = y1, y1 = t;
+}
+return x && y ? [[x0, y0], [x1, y1]] : x ? [x0, x1] : y && [y0, y1];
+}
+// Scale the data-space extent to pixels.
+if (x) {
+x0 = z[0], x1 = z[1];
+if (y) x0 = x0[0], x1 = x1[0];
+x0 = x(x0), x1 = x(x1);
+if (x1 < x0) t = x0, x0 = x1, x1 = t;
+extent[0][0] = x0, extent[1][0] = x1;
+}
+if (y) {
+y0 = z[0], y1 = z[1];
+if (x) y0 = y0[1], y1 = y1[1];
+y0 = y(y0), y1 = y(y1);
+if (y1 < y0) t = y0, y0 = y1, y1 = t;
+extent[0][1] = y0, extent[1][1] = y1;
+}
+return brush;
+};
+brush.clear = function() {
+extent[0][0] =
+extent[0][1] =
+extent[1][0] =
+extent[1][1] = 0;
+return brush;
+};
+brush.empty = function() {
+return (x && extent[0][0] === extent[1][0])
+|| (y && extent[0][1] === extent[1][1]);
+};
+brush.on = function(type, listener) {
+event.on(type, listener);
+return brush;
+};
+d3.select(window)
+.on("mousemove.brush", d3_svg_brushMove)
+.on("mouseup.brush", d3_svg_brushUp)
+.on("keydown.brush", d3_svg_brushKeydown)
+.on("keyup.brush", d3_svg_brushKeyup);
+return brush;
+};
+var d3_svg_brush,
+d3_svg_brushDispatch,
+d3_svg_brushTarget,
+d3_svg_brushX,
+d3_svg_brushY,
+d3_svg_brushExtent,
+d3_svg_brushDrag,
+d3_svg_brushResize,
+d3_svg_brushCenter,
+d3_svg_brushOffset;
+function d3_svg_brushRedrawX(g, extent) {
+g.select(".extent").attr("x", extent[0][0]);
+g.selectAll(".n,.s,.w,.nw,.sw").attr("x", extent[0][0] - 2);
+g.selectAll(".e,.ne,.se").attr("x", extent[1][0] - 3);
+g.selectAll(".extent,.n,.s").attr("width", extent[1][0] - extent[0][0]);
+}
+function d3_svg_brushRedrawY(g, extent) {
+g.select(".extent").attr("y", extent[0][1]);
+g.selectAll(".n,.e,.w,.nw,.ne").attr("y", extent[0][1] - 3);
+g.selectAll(".s,.se,.sw").attr("y", extent[1][1] - 4);
+g.selectAll(".extent,.e,.w").attr("height", extent[1][1] - extent[0][1]);
+}
+function d3_svg_brushKeydown() {
+if (d3.event.keyCode == 32 && d3_svg_brushTarget && !d3_svg_brushDrag) {
+d3_svg_brushCenter = null;
+d3_svg_brushOffset[0] -= d3_svg_brushExtent[1][0];
+d3_svg_brushOffset[1] -= d3_svg_brushExtent[1][1];
+d3_svg_brushDrag = 2;
+d3_eventCancel();
+}
+}
+function d3_svg_brushKeyup() {
+if (d3.event.keyCode == 32 && d3_svg_brushDrag == 2) {
+d3_svg_brushOffset[0] += d3_svg_brushExtent[1][0];
+d3_svg_brushOffset[1] += d3_svg_brushExtent[1][1];
+d3_svg_brushDrag = 0;
+d3_eventCancel();
+}
+}
+function d3_svg_brushMove() {
+if (d3_svg_brushOffset) {
+var mouse = d3.svg.mouse(d3_svg_brushTarget),
+g = d3.select(d3_svg_brushTarget);
+if (!d3_svg_brushDrag) {
+// If needed, determine the center from the current extent.
+if (d3.event.altKey) {
+if (!d3_svg_brushCenter) {
+d3_svg_brushCenter = [
+(d3_svg_brushExtent[0][0] + d3_svg_brushExtent[1][0]) / 2,
+(d3_svg_brushExtent[0][1] + d3_svg_brushExtent[1][1]) / 2
+];
+}
+// Update the offset, for when the ALT key is released.
+d3_svg_brushOffset[0] = d3_svg_brushExtent[+(mouse[0] < d3_svg_brushCenter[0])][0];
+d3_svg_brushOffset[1] = d3_svg_brushExtent[+(mouse[1] < d3_svg_brushCenter[1])][1];
+}
+// When the ALT key is released, we clear the center.
+else d3_svg_brushCenter = null;
+}
+// Update the brush extent for each dimension.
+if (d3_svg_brushX) {
+d3_svg_brushMove1(mouse, d3_svg_brushX, 0);
+d3_svg_brushRedrawX(g, d3_svg_brushExtent);
+}
+if (d3_svg_brushY) {
+d3_svg_brushMove1(mouse, d3_svg_brushY, 1);
+d3_svg_brushRedrawY(g, d3_svg_brushExtent);
+}
+// Notify listeners.
+d3_svg_brushDispatch("brush");
+}
+}
+function d3_svg_brushMove1(mouse, scale, i) {
+var range = d3_scaleExtent(scale.range()),
+offset = d3_svg_brushOffset[i],
+size = d3_svg_brushExtent[1][i] - d3_svg_brushExtent[0][i],
+min,
+max;
+// When dragging, reduce the range by the extent size and offset.
+if (d3_svg_brushDrag) {
+range[0] -= offset;
+range[1] -= size + offset;
+}
+// Clamp the mouse so that the extent fits within the range extent.
+min = Math.max(range[0], Math.min(range[1], mouse[i]));
+// Compute the new extent bounds.
+if (d3_svg_brushDrag) {
+max = (min += offset) + size;
+} else {
+// If the ALT key is pressed, then preserve the center of the extent.
+if (d3_svg_brushCenter) offset = Math.max(range[0], Math.min(range[1], 2 * d3_svg_brushCenter[i] - min));
+// Compute the min and max of the offset and mouse.
+if (offset < min) {
+max = min;
+min = offset;
+} else {
+max = offset;
+}
+}
+// Update the stored bounds.
+d3_svg_brushExtent[0][i] = min;
+d3_svg_brushExtent[1][i] = max;
+}
+function d3_svg_brushUp() {
+if (d3_svg_brushOffset) {
+d3_svg_brushMove();
+d3.select(d3_svg_brushTarget).selectAll(".resize").style("pointer-events", d3_svg_brush.empty() ? "none" : "all");
+d3_svg_brushDispatch("brushend");
+d3_svg_brush =
+d3_svg_brushDispatch =
+d3_svg_brushTarget =
+d3_svg_brushX =
+d3_svg_brushY =
+d3_svg_brushExtent =
+d3_svg_brushDrag =
+d3_svg_brushResize =
+d3_svg_brushCenter =
+d3_svg_brushOffset = null;
+d3_eventCancel();
+}
+}
+var d3_svg_brushCursor = {
+n: "ns-resize",
+e: "ew-resize",
+s: "ns-resize",
+w: "ew-resize",
+nw: "nwse-resize",
+ne: "nesw-resize",
+se: "nwse-resize",
+sw: "nesw-resize"
+};
+d3.behavior = {};
+d3.behavior.drag = function() {
+var event = d3.dispatch("drag", "dragstart", "dragend");
+function drag() {
+this
+.on("mousedown.drag", mousedown)
+.on("touchstart.drag", mousedown);
+d3.select(window)
+.on("mousemove.drag", d3_behavior_dragMove)
+.on("touchmove.drag", d3_behavior_dragMove)
+.on("mouseup.drag", d3_behavior_dragUp, true)
+.on("touchend.drag", d3_behavior_dragUp, true)
+.on("click.drag", d3_behavior_dragClick, true);
+}
+// snapshot the local context for subsequent dispatch
+function start() {
+d3_behavior_dragEvent = event;
+d3_behavior_dragEventTarget = d3.event.target;
+d3_behavior_dragOffset = d3_behavior_dragPoint((d3_behavior_dragTarget = this).parentNode);
+d3_behavior_dragMoved = 0;
+d3_behavior_dragArguments = arguments;
+}
+function mousedown() {
+start.apply(this, arguments);
+d3_behavior_dragDispatch("dragstart");
+}
+drag.on = function(type, listener) {
+event.on(type, listener);
+return drag;
+};
+return drag;
+};
+var d3_behavior_dragEvent,
+d3_behavior_dragEventTarget,
+d3_behavior_dragTarget,
+d3_behavior_dragArguments,
+d3_behavior_dragOffset,
+d3_behavior_dragMoved,
+d3_behavior_dragStopClick;
+function d3_behavior_dragDispatch(type) {
+var o = d3.event, p = d3_behavior_dragTarget.parentNode, dx = 0, dy = 0;
+if (p) {
+p = d3_behavior_dragPoint(p);
+dx = p[0] - d3_behavior_dragOffset[0];
+dy = p[1] - d3_behavior_dragOffset[1];
+d3_behavior_dragOffset = p;
+d3_behavior_dragMoved |= dx | dy;
+}
+try {
+d3.event = {dx: dx, dy: dy};
+d3_behavior_dragEvent[type].apply(d3_behavior_dragTarget, d3_behavior_dragArguments);
+} finally {
+d3.event = o;
+}
+o.preventDefault();
+}
+function d3_behavior_dragPoint(container, type) {
+// TODO Track touch points by identifier.
+var t = d3.event.changedTouches;
+return t ? d3.svg.touches(container, t)[0] : d3.svg.mouse(container);
+}
+function d3_behavior_dragMove() {
+if (!d3_behavior_dragTarget) return;
+var parent = d3_behavior_dragTarget.parentNode;
+// O NOES! The drag element was removed from the DOM.
+if (!parent) return d3_behavior_dragUp();
+d3_behavior_dragDispatch("drag");
+d3_eventCancel();
+}
+function d3_behavior_dragUp() {
+if (!d3_behavior_dragTarget) return;
+d3_behavior_dragDispatch("dragend");
+d3_behavior_dragTarget = null;
+// If the node was moved, prevent the mouseup from propagating.
+// Also prevent the subsequent click from propagating (e.g., for anchors).
+if (d3_behavior_dragMoved && d3_behavior_dragEventTarget === d3.event.target) {
+d3_behavior_dragStopClick = true;
+d3_eventCancel();
+}
+}
+function d3_behavior_dragClick() {
+if (d3_behavior_dragStopClick && d3_behavior_dragEventTarget === d3.event.target) {
+d3_eventCancel();
+d3_behavior_dragStopClick = false;
+d3_behavior_dragEventTarget = null;
+}
+}
+// TODO unbind zoom behavior?
+d3.behavior.zoom = function() {
+var xyz = [0, 0, 0],
+event = d3.dispatch("zoom"),
+extent = d3_behavior_zoomInfiniteExtent;
+function zoom() {
+this
+.on("mousedown.zoom", mousedown)
+.on("mousewheel.zoom", mousewheel)
+.on("DOMMouseScroll.zoom", mousewheel)
+.on("dblclick.zoom", dblclick)
+.on("touchstart.zoom", touchstart);
+d3.select(window)
+.on("mousemove.zoom", d3_behavior_zoomMousemove)
+.on("mouseup.zoom", d3_behavior_zoomMouseup)
+.on("touchmove.zoom", d3_behavior_zoomTouchmove)
+.on("touchend.zoom", d3_behavior_zoomTouchup)
+.on("click.zoom", d3_behavior_zoomClick, true);
+}
+// snapshot the local context for subsequent dispatch
+function start() {
+d3_behavior_zoomXyz = xyz;
+d3_behavior_zoomExtent = extent;
+d3_behavior_zoomDispatch = event.zoom;
+d3_behavior_zoomEventTarget = d3.event.target;
+d3_behavior_zoomTarget = this;
+d3_behavior_zoomArguments = arguments;
+}
+function mousedown() {
+start.apply(this, arguments);
+d3_behavior_zoomPanning = d3_behavior_zoomLocation(d3.svg.mouse(d3_behavior_zoomTarget));
+d3_behavior_zoomMoved = false;
+d3.event.preventDefault();
+window.focus();
+}
+// store starting mouse location
+function mousewheel() {
+start.apply(this, arguments);
+if (!d3_behavior_zoomZooming) d3_behavior_zoomZooming = d3_behavior_zoomLocation(d3.svg.mouse(d3_behavior_zoomTarget));
+d3_behavior_zoomTo(d3_behavior_zoomDelta() + xyz[2], d3.svg.mouse(d3_behavior_zoomTarget), d3_behavior_zoomZooming);
+}
+function dblclick() {
+start.apply(this, arguments);
+var mouse = d3.svg.mouse(d3_behavior_zoomTarget);
+d3_behavior_zoomTo(d3.event.shiftKey ? Math.ceil(xyz[2] - 1) : Math.floor(xyz[2] + 1), mouse, d3_behavior_zoomLocation(mouse));
+}
+// doubletap detection
+function touchstart() {
+start.apply(this, arguments);
+var touches = d3_behavior_zoomTouchup(),
+touch,
+now = Date.now();
+if ((touches.length === 1) && (now - d3_behavior_zoomLast < 300)) {
+d3_behavior_zoomTo(1 + Math.floor(xyz[2]), touch = touches[0], d3_behavior_zoomLocations[touch.identifier]);
+}
+d3_behavior_zoomLast = now;
+}
+zoom.extent = function(x) {
+if (!arguments.length) return extent;
+extent = x == null ? d3_behavior_zoomInfiniteExtent : x;
+return zoom;
+};
+zoom.on = function(type, listener) {
+event.on(type, listener);
+return zoom;
+};
+return zoom;
+};
+var d3_behavior_zoomDiv,
+d3_behavior_zoomPanning,
+d3_behavior_zoomZooming,
+d3_behavior_zoomLocations = {}, // identifier -> location
+d3_behavior_zoomLast = 0,
+d3_behavior_zoomXyz,
+d3_behavior_zoomExtent,
+d3_behavior_zoomDispatch,
+d3_behavior_zoomEventTarget,
+d3_behavior_zoomTarget,
+d3_behavior_zoomArguments,
+d3_behavior_zoomMoved,
+d3_behavior_zoomStopClick;
+function d3_behavior_zoomLocation(point) {
+return [
+point[0] - d3_behavior_zoomXyz[0],
+point[1] - d3_behavior_zoomXyz[1],
+d3_behavior_zoomXyz[2]
+];
+}
+// detect the pixels that would be scrolled by this wheel event
+function d3_behavior_zoomDelta() {
+// mousewheel events are totally broken!
+// https://bugs.webkit.org/show_bug.cgi?id=40441
+// not only that, but Chrome and Safari differ in re. to acceleration!
+if (!d3_behavior_zoomDiv) {
+d3_behavior_zoomDiv = d3.select("body").append("div")
+.style("visibility", "hidden")
+.style("top", 0)
+.style("height", 0)
+.style("width", 0)
+.style("overflow-y", "scroll")
+.append("div")
+.style("height", "2000px")
+.node().parentNode;
+}
+var e = d3.event, delta;
+try {
+d3_behavior_zoomDiv.scrollTop = 1000;
+d3_behavior_zoomDiv.dispatchEvent(e);
+delta = 1000 - d3_behavior_zoomDiv.scrollTop;
+} catch (error) {
+delta = e.wheelDelta || (-e.detail * 5);
+}
+return delta * .005;
+}
+// Note: Since we don't rotate, it's possible for the touches to become
+// slightly detached from their original positions. Thus, we recompute the
+// touch points on touchend as well as touchstart!
+function d3_behavior_zoomTouchup() {
+var touches = d3.svg.touches(d3_behavior_zoomTarget),
+i = -1,
+n = touches.length,
+touch;
+while (++i < n) d3_behavior_zoomLocations[(touch = touches[i]).identifier] = d3_behavior_zoomLocation(touch);
+return touches;
+}
+function d3_behavior_zoomTouchmove() {
+var touches = d3.svg.touches(d3_behavior_zoomTarget);
+switch (touches.length) {
+// single-touch pan
+case 1: {
+var touch = touches[0];
+d3_behavior_zoomTo(d3_behavior_zoomXyz[2], touch, d3_behavior_zoomLocations[touch.identifier]);
+break;
+}
+// double-touch pan + zoom
+case 2: {
+var p0 = touches[0],
+p1 = touches[1],
+p2 = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2],
+l0 = d3_behavior_zoomLocations[p0.identifier],
+l1 = d3_behavior_zoomLocations[p1.identifier],
+l2 = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2, l0[2]];
+d3_behavior_zoomTo(Math.log(d3.event.scale) / Math.LN2 + l0[2], p2, l2);
+break;
+}
+}
+}
+function d3_behavior_zoomMousemove() {
+d3_behavior_zoomZooming = null;
+if (d3_behavior_zoomPanning) {
+d3_behavior_zoomMoved = true;
+d3_behavior_zoomTo(d3_behavior_zoomXyz[2], d3.svg.mouse(d3_behavior_zoomTarget), d3_behavior_zoomPanning);
+}
+}
+function d3_behavior_zoomMouseup() {
+if (d3_behavior_zoomPanning) {
+if (d3_behavior_zoomMoved && d3_behavior_zoomEventTarget === d3.event.target) {
+d3_behavior_zoomStopClick = true;
+}
+d3_behavior_zoomMousemove();
+d3_behavior_zoomPanning = null;
+}
+}
+function d3_behavior_zoomClick() {
+if (d3_behavior_zoomStopClick && d3_behavior_zoomEventTarget === d3.event.target) {
+d3.event.stopPropagation();
+d3.event.preventDefault();
+d3_behavior_zoomStopClick = false;
+d3_behavior_zoomEventTarget = null;
+}
+}
+function d3_behavior_zoomTo(z, x0, x1) {
+z = d3_behavior_zoomExtentClamp(z, 2);
+var j = Math.pow(2, d3_behavior_zoomXyz[2]),
+k = Math.pow(2, z),
+K = Math.pow(2, (d3_behavior_zoomXyz[2] = z) - x1[2]),
+x_ = d3_behavior_zoomXyz[0],
+y_ = d3_behavior_zoomXyz[1],
+x = d3_behavior_zoomXyz[0] = d3_behavior_zoomExtentClamp((x0[0] - x1[0] * K), 0, k),
+y = d3_behavior_zoomXyz[1] = d3_behavior_zoomExtentClamp((x0[1] - x1[1] * K), 1, k),
+o = d3.event; // Events can be reentrant (e.g., focus).
+d3.event = {
+scale: k,
+translate: [x, y],
+transform: function(sx, sy) {
+if (sx) transform(sx, x_, x);
+if (sy) transform(sy, y_, y);
+}
+};
+function transform(scale, a, b) {
+scale.domain(scale.range().map(function(v) { return scale.invert(((v - b) * j) / k + a); }));
+}
+try {
+d3_behavior_zoomDispatch.apply(d3_behavior_zoomTarget, d3_behavior_zoomArguments);
+} finally {
+d3.event = o;
+}
+o.preventDefault();
+}
+var d3_behavior_zoomInfiniteExtent = [
+[-Infinity, Infinity],
+[-Infinity, Infinity],
+[-Infinity, Infinity]
+];
+function d3_behavior_zoomExtentClamp(x, i, k) {
+var range = d3_behavior_zoomExtent[i],
+r0 = range[0],
+r1 = range[1];
+return arguments.length === 3
+? Math.max(r1 * (r1 === Infinity ? -Infinity : 1 / k - 1),
+Math.min(r0 === -Infinity ? Infinity : r0, x / k)) * k
+: Math.max(r0, Math.min(r1, x));
+}
+})();

periplus