--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/chart/box.js Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,297 @@
+// Inspired by http://informationandvisualization.de/blog/box-plot
+d3.chart.box = function() {
+ var width = 1,
+ height = 1,
+ duration = 0,
+ domain = null,
+ value = Number,
+ whiskers = d3_chart_boxWhiskers,
+ quartiles = d3_chart_boxQuartiles,
+ tickFormat = null;
+
+ // For each small multiple…
+ function box(g) {
+ g.each(function(d, i) {
+ d = d.map(value).sort(d3.ascending);
+ var g = d3.select(this),
+ n = d.length,
+ min = d[0],
+ max = d[n - 1];
+
+ // Compute quartiles. Must return exactly 3 elements.
+ var quartileData = d.quartiles = quartiles(d);
+
+ // Compute whiskers. Must return exactly 2 elements, or null.
+ var whiskerIndices = whiskers && whiskers.call(this, d, i),
+ whiskerData = whiskerIndices && whiskerIndices.map(function(i) { return d[i]; });
+
+ // Compute outliers. If no whiskers are specified, all data are "outliers".
+ // We compute the outliers as indices, so that we can join across transitions!
+ var outlierIndices = whiskerIndices
+ ? d3.range(0, whiskerIndices[0]).concat(d3.range(whiskerIndices[1] + 1, n))
+ : d3.range(n);
+
+ // Compute the new x-scale.
+ var x1 = d3.scale.linear()
+ .domain(domain && domain.call(this, d, i) || [min, max])
+ .range([height, 0]);
+
+ // Retrieve the old x-scale, if this is an update.
+ var x0 = this.__chart__ || d3.scale.linear()
+ .domain([0, Infinity])
+ .range(x1.range());
+
+ // Stash the new scale.
+ this.__chart__ = x1;
+
+ // Note: the box, median, and box tick elements are fixed in number,
+ // so we only have to handle enter and update. In contrast, the outliers
+ // and other elements are variable, so we need to exit them! Variable
+ // elements also fade in and out.
+
+ // Update center line: the vertical line spanning the whiskers.
+ var center = g.selectAll("line.center")
+ .data(whiskerData ? [whiskerData] : []);
+
+ center.enter().insert("svg:line", "rect")
+ .attr("class", "center")
+ .attr("x1", width / 2)
+ .attr("y1", function(d) { return x0(d[0]); })
+ .attr("x2", width / 2)
+ .attr("y2", function(d) { return x0(d[1]); })
+ .style("opacity", 1e-6)
+ .transition()
+ .duration(duration)
+ .style("opacity", 1)
+ .attr("y1", function(d) { return x1(d[0]); })
+ .attr("y2", function(d) { return x1(d[1]); });
+
+ center.transition()
+ .duration(duration)
+ .style("opacity", 1)
+ .attr("y1", function(d) { return x1(d[0]); })
+ .attr("y2", function(d) { return x1(d[1]); });
+
+ center.exit().transition()
+ .duration(duration)
+ .style("opacity", 1e-6)
+ .attr("y1", function(d) { return x1(d[0]); })
+ .attr("y2", function(d) { return x1(d[1]); })
+ .remove();
+
+ // Update innerquartile box.
+ var box = g.selectAll("rect.box")
+ .data([quartileData]);
+
+ box.enter().append("svg:rect")
+ .attr("class", "box")
+ .attr("x", 0)
+ .attr("y", function(d) { return x0(d[2]); })
+ .attr("width", width)
+ .attr("height", function(d) { return x0(d[0]) - x0(d[2]); })
+ .transition()
+ .duration(duration)
+ .attr("y", function(d) { return x1(d[2]); })
+ .attr("height", function(d) { return x1(d[0]) - x1(d[2]); });
+
+ box.transition()
+ .duration(duration)
+ .attr("y", function(d) { return x1(d[2]); })
+ .attr("height", function(d) { return x1(d[0]) - x1(d[2]); });
+
+ // Update median line.
+ var medianLine = g.selectAll("line.median")
+ .data([quartileData[1]]);
+
+ medianLine.enter().append("svg:line")
+ .attr("class", "median")
+ .attr("x1", 0)
+ .attr("y1", x0)
+ .attr("x2", width)
+ .attr("y2", x0)
+ .transition()
+ .duration(duration)
+ .attr("y1", x1)
+ .attr("y2", x1);
+
+ medianLine.transition()
+ .duration(duration)
+ .attr("y1", x1)
+ .attr("y2", x1);
+
+ // Update whiskers.
+ var whisker = g.selectAll("line.whisker")
+ .data(whiskerData || []);
+
+ whisker.enter().insert("svg:line", "circle, text")
+ .attr("class", "whisker")
+ .attr("x1", 0)
+ .attr("y1", x0)
+ .attr("x2", width)
+ .attr("y2", x0)
+ .style("opacity", 1e-6)
+ .transition()
+ .duration(duration)
+ .attr("y1", x1)
+ .attr("y2", x1)
+ .style("opacity", 1);
+
+ whisker.transition()
+ .duration(duration)
+ .attr("y1", x1)
+ .attr("y2", x1)
+ .style("opacity", 1);
+
+ whisker.exit().transition()
+ .duration(duration)
+ .attr("y1", x1)
+ .attr("y2", x1)
+ .style("opacity", 1e-6)
+ .remove();
+
+ // Update outliers.
+ var outlier = g.selectAll("circle.outlier")
+ .data(outlierIndices, Number);
+
+ outlier.enter().insert("svg:circle", "text")
+ .attr("class", "outlier")
+ .attr("r", 5)
+ .attr("cx", width / 2)
+ .attr("cy", function(i) { return x0(d[i]); })
+ .style("opacity", 1e-6)
+ .transition()
+ .duration(duration)
+ .attr("cy", function(i) { return x1(d[i]); })
+ .style("opacity", 1);
+
+ outlier.transition()
+ .duration(duration)
+ .attr("cy", function(i) { return x1(d[i]); })
+ .style("opacity", 1);
+
+ outlier.exit().transition()
+ .duration(duration)
+ .attr("cy", function(i) { return x1(d[i]); })
+ .style("opacity", 1e-6)
+ .remove();
+
+ // Compute the tick format.
+ var format = tickFormat || x1.tickFormat(8);
+
+ // Update box ticks.
+ var boxTick = g.selectAll("text.box")
+ .data(quartileData);
+
+ boxTick.enter().append("svg:text")
+ .attr("class", "box")
+ .attr("dy", ".3em")
+ .attr("dx", function(d, i) { return i & 1 ? 6 : -6 })
+ .attr("x", function(d, i) { return i & 1 ? width : 0 })
+ .attr("y", x0)
+ .attr("text-anchor", function(d, i) { return i & 1 ? "start" : "end"; })
+ .text(format)
+ .transition()
+ .duration(duration)
+ .attr("y", x1);
+
+ boxTick.transition()
+ .duration(duration)
+ .text(format)
+ .attr("y", x1);
+
+ // Update whisker ticks. These are handled separately from the box
+ // ticks because they may or may not exist, and we want don't want
+ // to join box ticks pre-transition with whisker ticks post-.
+ var whiskerTick = g.selectAll("text.whisker")
+ .data(whiskerData || []);
+
+ whiskerTick.enter().append("svg:text")
+ .attr("class", "whisker")
+ .attr("dy", ".3em")
+ .attr("dx", 6)
+ .attr("x", width)
+ .attr("y", x0)
+ .text(format)
+ .style("opacity", 1e-6)
+ .transition()
+ .duration(duration)
+ .attr("y", x1)
+ .style("opacity", 1);
+
+ whiskerTick.transition()
+ .duration(duration)
+ .text(format)
+ .attr("y", x1)
+ .style("opacity", 1);
+
+ whiskerTick.exit().transition()
+ .duration(duration)
+ .attr("y", x1)
+ .style("opacity", 1e-6)
+ .remove();
+ });
+ d3.timer.flush();
+ }
+
+ box.width = function(x) {
+ if (!arguments.length) return width;
+ width = x;
+ return box;
+ };
+
+ box.height = function(x) {
+ if (!arguments.length) return height;
+ height = x;
+ return box;
+ };
+
+ box.tickFormat = function(x) {
+ if (!arguments.length) return tickFormat;
+ tickFormat = x;
+ return box;
+ };
+
+ box.duration = function(x) {
+ if (!arguments.length) return duration;
+ duration = x;
+ return box;
+ };
+
+ box.domain = function(x) {
+ if (!arguments.length) return domain;
+ domain = x == null ? x : d3.functor(x);
+ return box;
+ };
+
+ box.value = function(x) {
+ if (!arguments.length) return value;
+ value = x;
+ return box;
+ };
+
+ box.whiskers = function(x) {
+ if (!arguments.length) return whiskers;
+ whiskers = x;
+ return box;
+ };
+
+ box.quartiles = function(x) {
+ if (!arguments.length) return quartiles;
+ quartiles = x;
+ return box;
+ };
+
+ return box;
+};
+
+function d3_chart_boxWhiskers(d) {
+ return [0, d.length - 1];
+}
+
+function d3_chart_boxQuartiles(d) {
+ return [
+ d3.quantile(d, .25),
+ d3.quantile(d, .5),
+ d3.quantile(d, .75)
+ ];
+}