reinpk/index.html

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

.node {
  stroke: #fff;
  stroke-width: 1.5px;
}

.link {
  stroke: #999;
  stroke-opacity: .6;
}

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

var width = 960,
    height = 500;

var color = d3.scale.category20();

var force = d3.layout.force()
    .charge(-120)
    .linkDistance(30)
    .size([width, height]);

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

d3.json("miserables.json", function(error, graph) {
  force
      .nodes(graph.nodes)
      .links(graph.links)
      .start();

  var link = svg.selectAll(".link")
      .data(graph.links)
    .enter().append("line")
      .attr("class", "link")
      .style("stroke-width", function(d) { return Math.sqrt(d.value); });

  var node = svg.selectAll(".node")
      .data(graph.nodes)
    .enter().append("circle")
      .attr("class", "node")
      .attr("r", 5)
      .style("fill", function(d) { return color(d.group); })
      .call(force.drag);

  node.append("title")
      .text(function(d) { return d.name; });

  force.on("tick", function() {
    link.attr("x1", function(d) { return d.source.x; })
        .attr("y1", function(d) { return d.source.y; })
        .attr("x2", function(d) { return d.target.x; })
        .attr("y2", function(d) { return d.target.y; });

    node.attr("cx", function(d) { return d.x; })
        .attr("cy", function(d) { return d.y; });
  });
});

</script>

## miserables.json
{
  "nodes":[
    {"name":"active-accounts","group":2,"value":3152},

    {"name":"analytics.js","group":1,"value":2800},
    {"name":"analytics-ios","group":1,"value":304},
    {"name":"analytics-ruby","group":1,"value":294},

    {"name":"google_analytics","group":3,"value":2998},
    {"name":"mixpanel","group":3,"value":1805},
    {"name":"customer_io","group":3,"value":426},
    {"name":"intercom","group":3,"value":421},
    {"name":"kissmetrics","group":3,"value":380},
    {"name":"keen_io","group":3,"value":265},
    {"name":"heap","group":3,"value":257},
    {"name":"crazy_egg","group":3,"value":250},
    {"name":"clicky","group":3,"value":246},
    {"name":"optimizely","group":3,"value":234},
    {"name":"ad_roll","group":3,"value":203},
    {"name":"pingdom","group":3,"value":199}
  ],
  "links":[
    {"source":0,"target":1,"value":1},
    {"source":0,"target":2,"value":1},
    {"source":0,"target":3,"value":1},
    {"source":0,"target":4,"value":1},
    {"source":0,"target":5,"value":1},
    {"source":0,"target":6,"value":1},
    {"source":0,"target":7,"value":1},
    {"source":0,"target":8,"value":1},
    {"source":0,"target":9,"value":1},
    {"source":0,"target":10,"value":1},
    {"source":0,"target":11,"value":1},
    {"source":0,"target":12,"value":1},
    {"source":0,"target":13,"value":1},
    {"source":0,"target":14,"value":1},
    {"source":0,"target":15,"value":1}
  ]
}
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	.node {
	stroke: #fff;
	stroke-width: 1.5px;
	}

	.link {
	stroke: #999;
	stroke-opacity: .6;
	}

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

	var width = 960,
	height = 500;

	var color = d3.scale.category20();

	var force = d3.layout.force()
	.charge(-120)
	.linkDistance(30)
	.size([width, height]);

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

	d3.json("miserables.json", function(error, graph) {
	force
	.nodes(graph.nodes)
	.links(graph.links)
	.start();

	var link = svg.selectAll(".link")
	.data(graph.links)
	.enter().append("line")
	.attr("class", "link")
	.style("stroke-width", function(d) { return Math.sqrt(d.value); });

	var node = svg.selectAll(".node")
	.data(graph.nodes)
	.enter().append("circle")
	.attr("class", "node")
	.attr("r", 5)
	.style("fill", function(d) { return color(d.group); })
	.call(force.drag);

	node.append("title")
	.text(function(d) { return d.name; });

	force.on("tick", function() {
	link.attr("x1", function(d) { return d.source.x; })
	.attr("y1", function(d) { return d.source.y; })
	.attr("x2", function(d) { return d.target.x; })
	.attr("y2", function(d) { return d.target.y; });

	node.attr("cx", function(d) { return d.x; })
	.attr("cy", function(d) { return d.y; });
	});
	});

	</script>
	{
	"nodes":[
	{"name":"active-accounts","group":2,"value":3152},

	{"name":"analytics.js","group":1,"value":2800},
	{"name":"analytics-ios","group":1,"value":304},
	{"name":"analytics-ruby","group":1,"value":294},

	{"name":"google_analytics","group":3,"value":2998},
	{"name":"mixpanel","group":3,"value":1805},
	{"name":"customer_io","group":3,"value":426},
	{"name":"intercom","group":3,"value":421},
	{"name":"kissmetrics","group":3,"value":380},
	{"name":"keen_io","group":3,"value":265},
	{"name":"heap","group":3,"value":257},
	{"name":"crazy_egg","group":3,"value":250},
	{"name":"clicky","group":3,"value":246},
	{"name":"optimizely","group":3,"value":234},
	{"name":"ad_roll","group":3,"value":203},
	{"name":"pingdom","group":3,"value":199}
	],
	"links":[
	{"source":0,"target":1,"value":1},
	{"source":0,"target":2,"value":1},
	{"source":0,"target":3,"value":1},
	{"source":0,"target":4,"value":1},
	{"source":0,"target":5,"value":1},
	{"source":0,"target":6,"value":1},
	{"source":0,"target":7,"value":1},
	{"source":0,"target":8,"value":1},
	{"source":0,"target":9,"value":1},
	{"source":0,"target":10,"value":1},
	{"source":0,"target":11,"value":1},
	{"source":0,"target":12,"value":1},
	{"source":0,"target":13,"value":1},
	{"source":0,"target":14,"value":1},
	{"source":0,"target":15,"value":1}
	]
	}