Circle-Packing II

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

text {
  font: 10px sans-serif;
  text-anchor: middle;
}

.node circle {
  fill: #ddd;
}

.node:hover circle {
  stroke: #000;
  stroke-width: 1.2px;
}

</style>
<svg width="960" height="960"><g transform="translate(1,1)"></g></svg>
<script src="//d3js.org/d3.v4.0.0-alpha.35.min.js"></script>
<script>

var svg = d3.select("svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height");

var format = d3.format(",d");

var pack = d3.pack()
    .size([width - 2, height - 2])
    .padding(3);

d3.csv("flare.csv", type, function(error, data) {
  if (error) throw error;

var root = d3.hierarchy({children: data})
      .sum(function(d) { return d.value; })
      .sort(function(a, b) { return b.value - a.value; });

pack(root);

var node = svg.select("g")
    .selectAll("g")
    .data(root.children)
    .enter().append("g")
      .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
      .attr("class", "node");

node.append("circle")
      .attr("id", function(d) { return "node-" + d.data.id; })
      .attr("r", function(d) { return d.r; });

node.append("clipPath")
      .attr("id", function(d) { return "clip-" + d.data.id; })
    .append("use")
      .attr("xlink:href", function(d) { return "#node-" + d.data.id + ""; });

node.append("text")
      .attr("clip-path", function(d) { return "url(#clip-" + d.data.id + ")"; })
    .selectAll("tspan")
      .data(function(d) { return d.data.id.split(".").pop().split(/(?=[A-Z][^A-Z])/g); })
    .enter().append("tspan")
      .attr("x", 0)
      .attr("y", function(d, i, nodes) { return 13 + (i - nodes.length / 2 - 0.5) * 10; })
      .text(function(d) { return d; });

node.append("title")
      .text(function(d) { return d.data.id + "\n" + format(d.value); });
});

function type(d) {
  return (d.value = +d.value) ? d : null;
}

</script>

https://d3js.org/d3.v4.0.0-alpha.35.min.js