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November 5, 2011 16:44
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> | |
<title>Pie Multiples with Nesting</title> | |
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?2.4.5"></script> | |
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js?2.4.5"></script> | |
<style type="text/css"> | |
body { | |
text-align: center; | |
} | |
svg { | |
font: 10px sans-serif; | |
} | |
</style> | |
</head> | |
<body> | |
<script type="text/javascript"> | |
// Load the flight data asynchronously. | |
//d3.csv("flights.csv", function(flights) { | |
flights = [{key: "Damon", | |
values: [{degree: "MBA", count: 6, color: 0},{degree: "BBA", count: 3, color: 1}, {degree: "BBS", count: 2, color: 6}]}, | |
{key: "Steve", | |
values: [{degree: "MBA", count: 6, color: 9},{degree: "BBA", count: 3, color: 10}, {degree: "BBS", count: 2, color: 6}]} | |
] | |
// Define the margin, radius, and color scale. Colors are assigned lazily, so | |
// if you want deterministic behavior, define a domain for the color scale. | |
var m = 10, | |
r = 100, | |
//z = d3.scale.category20c(); | |
//z = d3.scale.ordinal().range() | |
z = [ | |
"#3182bd", "#6baed6", "#9ecae1", "#c6dbef", | |
"#e6550d", "#fd8d3c", "#fdae6b", "#fdd0a2", | |
"#31a354", "#74c476", "#a1d99b", "#c7e9c0", | |
"#756bb1", "#9e9ac8", "#bcbddc", "#dadaeb", | |
"#636363", "#969696", "#bdbdbd", "#d9d9d9" | |
]; | |
console.info(z) | |
console.info(z[1]) | |
// Define a pie layout: the pie angle encodes the count of flights. Since our | |
// data is stored in CSV, the counts are strings which we coerce to numbers. | |
var pie = d3.layout.pie() | |
.value(function(d) { console.info("WHATSSS");return +d.count; }) | |
.sort(function(a, b) { return b.count - a.count; }); | |
// Define an arc generator. Note the radius is specified here, not the layout. | |
var arc = d3.svg.arc() | |
.innerRadius(r / 2) | |
.outerRadius(r); | |
console.info(flights) | |
// Insert an svg element (with margin) for each airport in our dataset. A | |
// child g element translates the origin to the pie center. | |
var svg = d3.select("body").selectAll("div") | |
.data(flights) | |
.enter().append("div") // http://code.google.com/p/chromium/issues/detail?id=98951 | |
.style("display", "inline-block") | |
.style("width", (r + m) * 2 + "px") | |
.style("height", (r + m) * 2 + "px") | |
.append("svg:svg") | |
.attr("width", (r + m) * 2) | |
.attr("height", (r + m) * 2) | |
.append("svg:g") | |
.attr("transform", "translate(" + (r + m) + "," + (r + m) + ")"); | |
// Add a label for the airport. The `key` comes from the nest operator. | |
svg.append("svg:text") | |
.attr("dy", ".35em") | |
.attr("text-anchor", "middle") | |
.text(function(d) { return d.key; }); | |
// Pass the nested per-airport values to the pie layout. The layout computes | |
// the angles for each arc. Another g element will hold the arc and its label. | |
var g = svg.selectAll("g") | |
.data(function(d) { return pie(d.values); }) | |
.enter().append("svg:g"); | |
// Add a colored arc path, with a mouseover title showing the count. | |
g.append("svg:path") | |
.attr("d", arc) | |
.style("fill", function(d) { console.info(d.data.degree + ":" + d.data.color + ":" + z[d.data.color]); return z[d.data.color]; }) | |
.append("svg:title") | |
.text(function(d) { return d.data.degree + ": " + d.data.count; }); | |
// Add a label to the larger arcs, translated to the arc centroid and rotated. | |
g.filter(function(d) { return d.endAngle - d.startAngle > .2; }).append("svg:text") | |
.attr("dy", ".35em") | |
.attr("text-anchor", "middle") | |
.attr("transform", function(d) { return "translate(" + arc.centroid(d) + ")rotate(" + angle(d) + ")"; }) | |
.text(function(d) { return d.data.degree; }); | |
// Computes the label angle of an arc, converting from radians to degrees. | |
function angle(d) { | |
var a = (d.startAngle + d.endAngle) * 90 / Math.PI - 90; | |
return a > 90 ? a - 180 : a; | |
} | |
//}); | |
</script> | |
</body> | |
</html> |
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