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<html>
<head>
<title>Donut</title>
<script type="text/javascript" src="protovis-r3.3.js"></script>
</head>
<body>
<script type="text/javascript+protovis">
var data = pv.range(5).map(function(x) {return x;}),
w = 400,
h = 400,
r = w / 2,
t = 30,
a = pv.Scale.linear(0, pv.sum(data)).range(0, 2 * Math.PI);
var vis = new pv.Panel()
.width(w)
.height(h);
anchors=["outer","inner","start","center","end"]
vis.add(pv.Wedge)
.data(data)
.outerRadius(r)
.angle(a)
.anchor(function() { return anchors[this.index]}).add(pv.Label)
.text(function(d) {return anchors[this.index];})
vis.render();
</script>
</body>
</html>
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