diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/src/chart/box.js
--- /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)
+  ];
+}