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Bi-Level Partition 2
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license: mit |
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{ | |
"name": "UNC-CH Student Data", | |
"children": [ | |
{ | |
"name": "Gender", | |
"children": [ | |
{"name": "Female", | |
"children": [{"name": "Female", "size": 16827}] | |
}, | |
{"name": "Male", | |
"children": [{"name": "Male", "size": 12642}] | |
} | |
] | |
}, | |
{ | |
"name": "Age", | |
"children": [ | |
{"name": "Under 25", | |
"children": [{"name":"Under 25", "size":20873}] | |
}, | |
{"name": "25 and Over", | |
"children": [{"name":"25 and Over", "size":8595}] | |
} | |
] | |
}, | |
{ | |
"name": "Attendance", | |
"children": [ | |
{"name": "Full-Time", | |
"children": [{"name":"Full-Time", "size":25084}] | |
}, | |
{"name": "Part-Time", | |
"children": [{"name":"Part-Time", "size":4385}] | |
} | |
] | |
}, | |
{ | |
"name": "Residency", | |
"children": [ | |
{"name": "In-State", | |
"children": [{"name":"In-State", "size":21232}] | |
}, | |
{"name": "Out-of-State", | |
"children": [{"name":"Out-of-State", "size":8237}] | |
} | |
] | |
}, | |
{ | |
"name": "Enrollment", | |
"children": [ | |
{"name": "Undergraduate", | |
"children": [{"name":"Undergraduate", "size":18523}] | |
}, | |
{"name": "Graduate", | |
"children": [{"name":"Graduate", "size":8427}] | |
}, | |
{"name": "Professional", | |
"children": [{"name":"Professional", "size":2519}] | |
} | |
] | |
}, | |
{ | |
"name": "Citizenship", | |
"children": [ | |
{"name": "US Citizen", | |
"children": [{"name":"US Citizen", "size":27114}] | |
}, | |
{"name": "Resident Alien", | |
"children": [{"name":"Resident Alien", "size":763}] | |
}, | |
{"name": "Nonresident Alien", | |
"children": [{"name":"Nonresident Alien", "size":1592}] | |
} | |
] | |
}, | |
{ | |
"name": "Proximity", | |
"children": [ | |
{"name": "On-Campus", | |
"children": [{"name":"On-Campus", "size":27100}] | |
}, | |
{"name": "Off-Campus", | |
"children": [{"name":"Off-Campus", "size":2369}] | |
} | |
] | |
}, | |
{ | |
"name": "Race", | |
"children": [ | |
{"name": "American Indian or Alaskan Native", | |
"children": [{"name":"American Indian or Alaskan Native", "size":129}] | |
}, | |
{"name": "Asian", | |
"children": [{"name":"Asian", "size":27114}] | |
}, | |
{"name": "Black or African-American", | |
"children": [{"name":"Black or African-American", "size":3759}] | |
}, | |
{"name": "Hispanic", | |
"children": [{"name":"Hispanic", "size":2342}] | |
}, | |
{"name": "Native Hawaiian or Pacific Islander", | |
"children": [{"name":"Native Hawaiian or Pacific Islander", "size":2145}] | |
}, | |
{"name": "Race/Ethnicity Unknown", | |
"children": [{"name":"Race/Ethnicity Unknown", "size":43}] | |
}, | |
{"name": "Two or More Races", | |
"children": [{"name":"Two or More Races", "size":1184}] | |
}, | |
{"name": "White", | |
"children": [{"name":"White", "size":18257}] | |
} | |
] | |
} | |
] | |
} |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
circle, | |
path { | |
cursor: pointer; | |
} | |
circle { | |
fill: none; | |
pointer-events: all; | |
} | |
</style> | |
<body> | |
<script src="//d3js.org/d3.v3.min.js"></script> | |
<script> | |
var margin = {top: 350, right: 480, bottom: 350, left: 480}, | |
radius = Math.min(margin.top, margin.right, margin.bottom, margin.left) - 10; | |
var hue = d3.scale.category10(); | |
var luminance = d3.scale.sqrt() | |
.domain([0, 1e6]) | |
.clamp(true) | |
.range([90, 20]); | |
var svg = d3.select("body").append("svg") | |
.attr("width", margin.left + margin.right) | |
.attr("height", margin.top + margin.bottom) | |
.append("g") | |
.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
var partition = d3.layout.partition() | |
.sort(function(a, b) { return d3.ascending(a.name, b.name); }) | |
.size([2 * Math.PI, radius]); | |
var arc = d3.svg.arc() | |
.startAngle(function(d) { return d.x; }) | |
.endAngle(function(d) { return d.x + d.dx ; }) | |
.padAngle(.01) | |
.padRadius(radius / 3) | |
.innerRadius(function(d) { return radius / 3 * d.depth; }) | |
.outerRadius(function(d) { return radius / 3 * (d.depth + 1) - 1; }); | |
d3.json("flare.json", function(error, root) { | |
if (error) throw error; | |
// Compute the initial layout on the entire tree to sum sizes. | |
// Also compute the full name and fill color for each node, | |
// and stash the children so they can be restored as we descend. | |
partition | |
.value(function(d) { return d.size; }) | |
.nodes(root) | |
.forEach(function(d) { | |
d._children = d.children; | |
d.sum = d.value; | |
d.key = key(d); | |
d.fill = fill(d); | |
}); | |
// Now redefine the value function to use the previously-computed sum. | |
partition | |
.children(function(d, depth) { return depth < 2 ? d._children : null; }) | |
.value(function(d) { return d.sum; }); | |
var center = svg.append("circle") | |
.attr("r", radius / 3) | |
.on("click", zoomOut); | |
center.append("title") | |
.text("zoom out"); | |
var path = svg.selectAll("path") | |
.data(partition.nodes(root).slice(1)) | |
.enter().append("path") | |
.attr("d", arc) | |
.style("fill", function(d) { return d.fill; }) | |
.each(function(d) { this._current = updateArc(d); }) | |
.on("click", zoomIn); | |
function zoomIn(p) { | |
if (p.depth > 1) p = p.parent; | |
if (!p.children) return; | |
zoom(p, p); | |
} | |
function zoomOut(p) { | |
if (!p.parent) return; | |
zoom(p.parent, p); | |
} | |
// Zoom to the specified new root. | |
function zoom(root, p) { | |
if (document.documentElement.__transition__) return; | |
// Rescale outside angles to match the new layout. | |
var enterArc, | |
exitArc, | |
outsideAngle = d3.scale.linear().domain([0, 2 * Math.PI]); | |
function insideArc(d) { | |
return p.key > d.key | |
? {depth: d.depth - 1, x: 0, dx: 0} : p.key < d.key | |
? {depth: d.depth - 1, x: 2 * Math.PI, dx: 0} | |
: {depth: 0, x: 0, dx: 2 * Math.PI}; | |
} | |
function outsideArc(d) { | |
return {depth: d.depth + 1, x: outsideAngle(d.x), dx: outsideAngle(d.x + d.dx) - outsideAngle(d.x)}; | |
} | |
center.datum(root); | |
// When zooming in, arcs enter from the outside and exit to the inside. | |
// Entering outside arcs start from the old layout. | |
if (root === p) enterArc = outsideArc, exitArc = insideArc, outsideAngle.range([p.x, p.x + p.dx]); | |
path = path.data(partition.nodes(root).slice(1), function(d) { return d.key; }); | |
// When zooming out, arcs enter from the inside and exit to the outside. | |
// Exiting outside arcs transition to the new layout. | |
if (root !== p) enterArc = insideArc, exitArc = outsideArc, outsideAngle.range([p.x, p.x + p.dx]); | |
d3.transition().duration(d3.event.altKey ? 7500 : 750).each(function() { | |
path.exit().transition() | |
.style("fill-opacity", function(d) { return d.depth === 1 + (root === p) ? 1 : 0; }) | |
.attrTween("d", function(d) { return arcTween.call(this, exitArc(d)); }) | |
.remove(); | |
path.enter().append("path") | |
.style("fill-opacity", function(d) { return d.depth === 2 - (root === p) ? 1 : 0; }) | |
.style("fill", function(d) { return d.fill; }) | |
.on("click", zoomIn) | |
.each(function(d) { this._current = enterArc(d); }); | |
path.transition() | |
.style("fill-opacity", 1) | |
.attrTween("d", function(d) { return arcTween.call(this, updateArc(d)); }); | |
}); | |
} | |
}); | |
function key(d) { | |
var k = [], p = d; | |
while (p.depth) k.push(p.name), p = p.parent; | |
return k.reverse().join("."); | |
} | |
function fill(d) { | |
var p = d; | |
while (p.depth > 1) p = p.parent; | |
var c = d3.lab(hue(p.name)); | |
c.l = luminance(d.sum); | |
return c; | |
} | |
function arcTween(b) { | |
var i = d3.interpolate(this._current, b); | |
this._current = i(0); | |
return function(t) { | |
return arc(i(t)); | |
}; | |
} | |
function updateArc(d) { | |
return {depth: d.depth, x: d.x, dx: d.dx}; | |
} | |
d3.select(self.frameElement).style("height", margin.top + margin.bottom + "px"); | |
</script> |
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