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<html>
<head>
<title>Segmented Area</title>
<script type="text/javascript" src="protovis-r3.3.js"></script>
</head>
<body>
<script type="text/javascript+protovis">
var vis = new pv.Panel()
.width(500)
.height(200)
.top(50)
.bottom(50)
.left(10)
.right(10);
vis.add(pv.Area)
.segmented(true)
.data(function() pv.range(0, 6, .1).map(Math.sin))
.bottom(0)
.left(function() this.index / 59 * 500)
.height(function(d) (d + 1) / 2 * 200 + 50)
.fillStyle(function(d) {console.log((d+1)*180);return "hsl(" + (d + 1) * 180 + ",50,50)"});
vis.render();
</script>
</body>
</html>
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