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jiankuang/index.html

Last active May 29, 2016 17:04
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D3 Layout Pie Chart
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index.html
<body>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script type="text/javascript">
var data = [10, 50, 80];
var r = 300; // outer radius
var color = d3.scale.ordinal()
.range(["red", "blue", "orange"]);
var svg = d3.select("body").append("svg")
.attr("width", 700)
.attr("height", 700);
var group = svg.append("g")
.attr("transform", "translate(300, 300)"); // set center of pie to 300,300
var arc = d3.svg.arc()
.innerRadius(150)
.outerRadius(r);
var pie = d3.layout.pie()
.value(function(d) { return d; }); // pie function transform data into specific format
var arcs = group.selectAll(".arc")
.data(pie(data))
.enter()
.append("g")
.attr("class", "arc");
arcs.append("path")
.attr("d", arc) // here the arc function works on every record d of data
.attr("fill", function(d){ return color(d.data); });
arcs.append("text")
.attr("transform", function(d){ return "translate(" + arc.centroid(d) + ")"; }) // put text at the center of every arc
.attr("text-anchor", "middle")
.attr("font-size", "1.5em")
.text(function(d) { return d.data; });
</script>
</body>
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