D3.js donut chart

by HugeHugh

HTML

<script src="http://d3js.org/d3.v3.min.js"></script>

CSS

body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  margin: auto;
  position: relative;
  width: 960px;
}

text {
  font: 10px sans-serif;
}

form {
  position: absolute;
  right: 10px;
  top: 10px;
}

JavaScript

var dataset = {
  apples: [53245, 28479, 19697, 24037, 40245],
};

var width = 460,
    height = 300,
    radius = Math.min(width, height) / 2;

var color = d3.scale.category20();

var pie = d3.layout.pie()
    .sort(null);

var arc = d3.svg.arc()
    .innerRadius(radius * .4)
    .outerRadius(radius - 20);

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
    .append("g")
    .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");

var grads = svg.append("defs").selectAll("radialGradient").data(pie(dataset.apples))
    .enter().append("radialGradient")
    .attr("gradientUnits", "userSpaceOnUse")
    .attr("cx", 0)
    .attr("cy", 0)
    .attr("r", "80%")
    .attr("id", function(d, i) { return "grad" + i; });
grads.append("stop").attr("offset", "0%").style("stop-color", "black");
grads.append("stop").attr("offset", "35%").style("stop-color", function(d, i) { return color(i); });
grads.append("stop").attr("offset", "100%").style("stop-color", function(d, i) { return color(i); });

var path = svg.selectAll("path")
    .data(pie(dataset.apples))
  .enter().append("path")
    .attr("fill", function(d, i) { return "url(#grad" + i + ")"; })
    .attr("d", arc);