D3 Examples - Circle Packing with Zero Values

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<!DOCTYPE html>
<meta charset="utf-8">
<body>
<style>
​
circle {
  stroke: #000;
  fill-opacity: .1;
}
​
</style>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
​
var data = {
  children: [
    {value: 1.94},
    {value: 0.42},
    {value: 0},
    {value: 3.95},
    {value: 0.06},
    {value: 0.91}
  ]
};
​
var width = 960,
    height = 500;
​
var pack = d3.layout.pack()
    .size([width, height]);
​
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);
​
svg.data([data]).selectAll(".node")
    .data(pack.nodes)
  .enter().append("circle")
    .attr("class", "node")
    .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
    .attr("r", function(d) { return d.r; });
​
</script>
​
    