Pie chart

Copy of https://gist.github.com/mbostock/3887235

by christopheviau

HTML

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

CSS

body {
  font: 10px sans-serif;
}

.arc path {
  stroke: #fff;
}

JavaScript

var data = [{"age":"<5","population":10},{"age":"5-13","population":10},{"age":"14-17","population":20},{"age":"18-24","population":21},{"age":"25-44","population":30},{"age":"45-64","population":31},{"age":"≥65","population":40}]

var width = 960,
    height = 500,
    radius = Math.min(width, height) / 2;

var color = d3.scale.ordinal()
    .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

var arc = d3.svg.arc()
    .outerRadius(radius - 10)
    .innerRadius(0);

var pie = d3.layout.pie()
    .sort(null)
    .value(function(d) { return d.population; });

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

  var g = svg.selectAll(".arc")
      .data(pie(data))
    .enter().append("g")
      .attr("class", "arc");

  g.append("path")
      .attr("d", arc)
      .style("fill", function(d) { return color(d.data.age); });

  g.append("text")
      .attr("transform", function(d) { return "translate(" + arc.centroid(d) + ")"; })
      .attr("dy", ".35em")
      .style("text-anchor", "middle")
      .text(function(d) { return d.data.age; });