clayzermk1/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Easilly create labels for any pie graph using simple trigonometric functions.

  
## data.csv

          
            age
            population

            
              <5
              2704659

            
              5-13
              4499890

            
              14-17
              2159981

            
              18-24
              3853788

            
              25-44
              14106543

            
              45-64
              8819342

            
              ≥65
              612463

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

body {
  font: 10px sans-serif;
}

.arc path {
  stroke: #fff;
}

</style>
<body>
<script src="http://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(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

var arc = d3.svg.arc()
    .outerRadius(radius - 30)
    .innerRadius(radius - 100);

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 + ")");

d3.csv("data.csv", function(error, data) {

  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(" + ( (radius - 12) * Math.sin( ((d.endAngle - d.startAngle) / 2) + d.startAngle ) ) + "," + ( -1 * (radius - 12) * Math.cos( ((d.endAngle - d.startAngle) / 2) + d.startAngle ) ) + ")"; })
      .attr("dy", ".35em")
      .style("text-anchor", function(d) {
        var rads = ((d.endAngle - d.startAngle) / 2) + d.startAngle;
        if ( (rads > 7 * Math.PI / 4 && rads < Math.PI / 4) || (rads > 3 * Math.PI / 4 && rads < 5 * Math.PI / 4) ) {
          return "middle";
        } else if (rads >= Math.PI / 4 && rads <= 3 * Math.PI / 4) {
          return "start";
        } else if (rads >= 5 * Math.PI / 4 && rads <= 7 * Math.PI / 4) {
          return "end";
        } else {
          return "middle";
        }
      })
      .text(function(d) {
        return d.data.age; });

});

</script>
	age	population
	<5	2704659
	5-13	4499890
	14-17	2159981
	18-24	3853788
	25-44	14106543
	45-64	8819342
	≥65	612463
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	font: 10px sans-serif;
	}

	.arc path {
	stroke: #fff;
	}

	</style>
	<body>
	<script src="http://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(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

	var arc = d3.svg.arc()
	.outerRadius(radius - 30)
	.innerRadius(radius - 100);

	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 + ")");

	d3.csv("data.csv", function(error, data) {

	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(" + ( (radius - 12) * Math.sin( ((d.endAngle - d.startAngle) / 2) + d.startAngle ) ) + "," + ( -1 * (radius - 12) * Math.cos( ((d.endAngle - d.startAngle) / 2) + d.startAngle ) ) + ")"; })
	.attr("dy", ".35em")
	.style("text-anchor", function(d) {
	var rads = ((d.endAngle - d.startAngle) / 2) + d.startAngle;
	if ( (rads > 7 * Math.PI / 4 && rads < Math.PI / 4) \|\| (rads > 3 * Math.PI / 4 && rads < 5 * Math.PI / 4) ) {
	return "middle";
	} else if (rads >= Math.PI / 4 && rads <= 3 * Math.PI / 4) {
	return "start";
	} else if (rads >= 5 * Math.PI / 4 && rads <= 7 * Math.PI / 4) {
	return "end";
	} else {
	return "middle";
	}
	})
	.text(function(d) {
	return d.data.age; });

	});

	</script>