D3 Radial Abstraction

Experiments in abstracting a pie/donut/concentric donut/spider chart.

by clayzermk1

HTML

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

<div id="chart"></div>

CSS

#chart {
    border: 1px solid red;
}

.arc path {
  stroke: #fff;
}

JavaScript

/*
age,population
<5,2704659
5-13,4499890
14-17,2159981
18-24,3853788
25-44,14106543
45-64,8819342
≥65,612463
*/
var data = [
    { age: "<5", population: 2704659 },
    { age: "5-13", population: 4499890 },
    { age: "14-17", population: 2159981 },
    { age: "18-24", population: 3853788 },
    { age: "25-44", population: 14106543 },
    { age: "45-64", population: 8819342 },
    { age: "≥65", population: 612463 }
];

var width = 600,
    height = 600,
    radius = (Math.min(width, height) / 2) - 10;

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

var arc = d3.svg.arc()
    .outerRadius(radius)
    .innerRadius(radius - (0.25 * radius));

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

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

data.forEach(function(d) {
    d.population = +d.population;
});

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; });