toolkit/javascript/d3/examples/box/box.js
changeset 47 c0b4a8b5a012
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/examples/box/box.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,68 @@
+var w = 120,
+    h = 500,
+    m = [10, 50, 20, 50], // top right bottom left
+    min = Infinity,
+    max = -Infinity;
+
+var chart = d3.chart.box()
+    .whiskers(iqr(1.5))
+    .width(w - m[1] - m[3])
+    .height(h - m[0] - m[2]);
+
+d3.csv("../data/morley.csv", function(csv) {
+  var data = [];
+
+  csv.forEach(function(x) {
+    var e = ~~x.Expt - 1,
+        r = ~~x.Run - 1,
+        s = ~~x.Speed,
+        d = data[e];
+    if (!d) d = data[e] = [s];
+    else d.push(s);
+    if (s > max) max = s;
+    if (s < min) min = s;
+  });
+
+  chart.domain([min, max]);
+
+  var vis = d3.select("#chart").selectAll("svg")
+      .data(data)
+    .enter().append("svg:svg")
+      .attr("class", "box")
+      .attr("width", w)
+      .attr("height", h)
+    .append("svg:g")
+      .attr("transform", "translate(" + m[3] + "," + m[0] + ")")
+      .call(chart);
+
+  chart.duration(1000);
+  window.transition = function() {
+    vis.map(randomize).call(chart);
+  };
+});
+
+function randomize(d) {
+  if (!d.randomizer) d.randomizer = randomizer(d);
+  return d.map(d.randomizer);
+}
+
+function randomizer(d) {
+  var k = d3.max(d) * .02;
+  return function(d) {
+    return Math.max(min, Math.min(max, d + k * (Math.random() - .5)));
+  };
+}
+
+// Returns a function to compute the interquartile range.
+function iqr(k) {
+  return function(d, i) {
+    var q1 = d.quartiles[0],
+        q3 = d.quartiles[2],
+        iqr = (q3 - q1) * k,
+        i = -1,
+        j = d.length;
+    while (d[++i] < q1 - iqr);
+    while (d[--j] > q3 + iqr);
+    return [i, j];
+  };
+}