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<meta charset="utf-8">
<style>
text {
font: 10px sans-serif;
}
tspan:last-child {
font-size: 9px;
fill-opacity: 0.8;
}
</style>
<svg width="960" height="1060"></svg>
<script src="//d3js.org/d3.v4.0.0-alpha.35.min.js"></script>
<script>
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var format = d3.format(",d");
var color = d3.scaleRainbow();
var stratify = d3.stratify()
.parentId(function(d) { return d.id.substring(0, d.id.lastIndexOf(".")); });
var treemap = d3.treemap()
.size([width, height])
.round(true)
.padding(1);
d3.csv("flare.csv", function(error, data) {
if (error) throw error;
var sum = 0;
var root = stratify(data)
.sum(function(d) { return d.value; })
.sort(function(a, b) { return b.height - a.height || b.value - a.value; });
treemap(root);
color.domain([0, root.value]);
var cell = svg.selectAll("g")
.data(root.leaves())
.enter().append("g")
.attr("transform", function(d) { return "translate(" + d.x0 + "," + d.y0 + ")"; });
cell.append("rect")
.attr("id", function(d) { return "rect-" + d.id; })
.attr("width", function(d) { return d.x1 - d.x0; })
.attr("height", function(d) { return d.y1 - d.y0; })
.style("fill", function(d) { return color(sum += d.value); });
cell.append("clipPath")
.attr("id", function(d) { return "clip-" + d.id; })
.append("use")
.attr("xlink:href", function(d) { return "#rect-" + d.id + ""; });
cell.append("text")
.attr("clip-path", function(d) { return "url(#clip-" + d.id + ")"; })
.selectAll("tspan")
.data(function(d) { return d.id.substring(d.id.lastIndexOf(".") + 1).split(/(?=[A-Z][^A-Z])/g).concat(format(d.value)); })
.enter().append("tspan")
.attr("x", 4)
.attr("y", function(d, i) { return 13 + i * 10; })
.text(function(d) { return d; });
cell.append("title")
.text(function(d) { return d.id + "\n" + format(d.value); });
});
</script>
https://d3js.org/d3.v4.0.0-alpha.35.min.js