d3.pie example

forked from anonymous's block: d3.pie example

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg {
      width: 100%;
      height: 100%;
    }
  </style>
</head>

<body>
<svg></svg>
<script>
  var colors = d3.scaleOrdinal(d3.schemeCategory10); //maps integers to colors
  var data = [1, 1, 2, 3, 5, 8, 13, 21]; //data we want to turn into a pie chart
  var pies = d3.pie()(data); // turns into data for pie chart with start and end angles

var arc = d3.arc()
  						.innerRadius(0) //means full circle. if not 0, would be donut
  						.outerRadius(150) //size of circle
  						.startAngle(d =>d.startAngle) //how does it get d???
  						.endAngle(d=> d.endAngle);
  
  var svg = d3.select('svg')
  						.append('g')
  						.attr('transform', 'translate(200,200)');
  
  svg.selectAll('path')
  	.data(pies).enter().append('path')
  	.attr('d', arc)
  	.attr('fill', (d, i) => colors(d.value))
  	.attr('stroke', '#fff')

</script>
</body>

https://d3js.org/d3.v4.min.js