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25_ring.html
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25_ring.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>D3: Pie layout, ring chart</title>
<script type="text/javascript" src="d3.js"></script>
<style type="text/css">
body {
background-color: gray;
}
svg {
background-color: white;
}
text {
font-family: sans-serif;
font-size: 12px;
fill: white;
}
</style>
</head>
<body>
<script type="text/javascript">
//Width and height
var w = 300;
var h = 300;
var dataset = [ 5, 10, 20, 45, 6, 25 ];
var outerRadius = w / 2;
var innerRadius = w / 3;
var arc = d3.svg.arc()
.innerRadius(innerRadius)
.outerRadius(outerRadius);
var pie = d3.layout.pie();
//Easy colors accessible via a 10-step ordinal scale
var color = d3.scale.category10();
//Create SVG element
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
//Set up groups
var arcs = svg.selectAll("g.arc")
.data(pie(dataset))
.enter()
.append("g")
.attr("class", "arc")
.attr("transform", "translate(" + outerRadius + "," + outerRadius + ")");
//Draw arc paths
arcs.append("path")
.attr("fill", function(d, i) {
return color(i);
})
.attr("d", arc);
//Labels
arcs.append("text")
.attr("transform", function(d) {
return "translate(" + arc.centroid(d) + ")";
})
.attr("text-anchor", "middle")
.text(function(d) {
return d.value;
});
</script>
</body>
</html>