Donut-Pie Chart

Donut chart circumscribing a pie chart--used for displaying parts of a whole with hierarchical data.

forked from mbostock's block: Donut Chart

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.arc text,
.wedge text {
  font: 10px sans-serif;
  text-anchor: middle;
}

.arc path,
.wedge path {
  stroke: #fff;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

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

var color = d3.scale.ordinal()
    .range(["#fef0d9", "#fdcc8a", "#fc8d59", "#bdbdbd"])
		.domain(["New", "Open", "Reopened", "Closed"]);
  
var arc = d3.svg.arc()
    .outerRadius(radius - 10)
    .innerRadius(radius - 70);

var wedge = d3.svg.arc()
    .outerRadius(radius - 70)
    .innerRadius(0);

var labelWedge = d3.svg.arc()
    .outerRadius(radius - 110)
    .innerRadius(radius - 110);
  
var pie = d3.layout.pie()
    .sort(null)
    .value(function(d) { return d.count; });

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

d3.csv("data.csv", type, function(error, data) {
  if (error) throw error;
	
  console.log("data", data);
  data.sort(function(a, b) {
    order = {"New":1, "Open":2, "Reopened": 3, "Closed": 4}
    
  	return d3.ascending(order[a.current_status], order[b.current_status]) || 
      		 d3.ascending(order[a.prior_status], order[b.prior_status]);
	});
  
  nested = d3.nest()
    .key(function(d){ return d.current_status; })
  	.rollup(function(d){ return d3.sum(d, function(d){ return d.count; })})
  	.entries(data);
  
  nested.forEach(function(d) {
   	d.current_status = d.key;
   	d.count = d.values;
    delete d["key"];
    delete d["values"];
  });
  
  console.log("nested", nested);
  
  var g = svg.selectAll(".arc")
      .data(pie(nested))
    .enter().append("g")
      .attr("class", "arc");

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

g.append("text")
      .attr("transform", function(d) { return "translate(" + arc.centroid(d) + ")"; })
      .attr("dy", ".35em")
      .text(function(d) { return d.data.current_status; });
  
 	var g = svg.selectAll(".wedge")
      .data(pie(data))
    .enter().append("g")
      .attr("class", "wedge");

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

g.append("text")
      .attr("transform", function(d) { return "translate(" + labelWedge.centroid(d) + ")"; })
      .attr("dy", ".35em")
      .text(function(d) { return d.data.prior_status; });
  
});

function type(d) {
  d.count = +d.count;
  return d;
}

</script>

https://d3js.org/d3.v3.min.js