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Last active August 29, 2015 14:15
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Enclosure diagrams use containment to represent the hierarchy. Although circle packing is not as space-efficient as a treemap, it better reveals the hierarchy. Implementation based on work by Jeff Heer. Data shows the Flare class hierarchy, also courtesy Jeff Heer.

See also this zoomable version.

{
"name": "domain",
"children": [
{
"name": "Level",
"children": [
{
"name": "id",
"children": [
{
"name": "String",
"size": 3938
}
]
},
{
"name": "goal",
"children": [
{
"name": "type",
"children": [
{
"name": "String",
"size": 3938
}
]
},
{
"name": "opts",
"children": [
{
"name": "Object",
"size": 3938
}
]
}
]
},
{
"name": "cells",
"children": [
{
"name": "CellCollection",
"children": [
{
"name": "Array",
"children": [
{
"name": "Cell",
"children": [
{
"name": "gene",
"children": [
{
"size": 3938
}
]
}
]
}
]
}
]
}
]
}
]
}
]
}
<!DOCTYPE html>
<meta charset="utf-8">
<style>
circle {
fill: rgb(31, 119, 180);
fill-opacity: .25;
stroke: rgb(31, 119, 180);
stroke-width: 1px;
}
.leaf circle {
fill: #ff7f0e;
fill-opacity: 1;
}
text {
font: 10px sans-serif;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var diameter = 960,
format = d3.format(",d");
var pack = d3.layout.pack()
.size([diameter - 4, diameter - 4])
.value(function(d) { return d.size; });
var svg = d3.select("body").append("svg")
.attr("width", diameter)
.attr("height", diameter)
.append("g")
.attr("transform", "translate(2,2)");
d3.json("flare.json", function(error, root) {
var node = svg.datum(root).selectAll(".node")
.data(pack.nodes)
.enter().append("g")
.attr("class", function(d) { return d.children ? "node" : "leaf node"; })
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
node.append("title")
.text(function(d) { return d.name + (d.children ? "" : ": " + format(d.size)); });
node.append("circle")
.attr("r", function(d) { return d.r; });
node.filter(function(d) { return !d.children; }).append("text")
.attr("dy", ".3em")
.style("text-anchor", "middle")
.text(function(d) { return d.name.substring(0, d.r / 3); });
});
d3.select(self.frameElement).style("height", diameter + "px");
</script>
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