D3 Examples - Unipartite Community Graph

Unipartite Community Graph

A quick adaptation of Mike Bostock's force-directed graph showing character co-occurence in Les Misérables. In this version, the character names are displayed. This is accomplished by wrapping both circles and text svg components within a group svg component.

Compare to the original diagram by Mike Bostock.

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}
​
.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;
}
​
text {
  font-family: sans-serif;
  font-size: 10px;
}
​
</style>
<svg width="960" height="600"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
​
var svg = d3.select("svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height");
​
var color = d3.scaleOrdinal(d3.schemeCategory20);
​
var simulation = d3.forceSimulation()
    .force("link", d3.forceLink().id(function(d) {
        return d.id; }))
        .force('charge',
                d3.forceManyBody().strength(-200)
            )
    .force("center", d3.forceCenter(width / 2, height / 2))
    .force('y', d3.forceY(0))
     .force('x', d3.forceX(0));
d3.json("got_unipartite_data.json", function(error, graph) {
  if (error) throw error;
    console.log(graph);
  var link = svg.append("g")
      .attr("class", "links")
    .selectAll("line")
    .data(graph.links)
    .enter().append("line")
      .attr("stroke-width", "1");
​
  var node = svg.append("g")
      .attr("class", "nodes")
    .selectAll("g")
    .data(graph.nodes)
    .enter().append("g")
    
  var circles = node.append("circle")
      .attr("r", "5")
      .attr("fill", function(d) { return color(d.community); })
      .call(d3.drag()
          .on("start", dragstarted)
          .on("drag", dragged)
          .on("end", dragended));
​
  var lables = node.append("text")
      .text(function(d) {
        return d.id;
      })
      .attr('x', 6)
      .attr('y', 3);
​
  node.append("title")
      .text(function(d) { return d.id; });
​
  simulation
      .nodes(graph.nodes)
      .on("tick", ticked);
​
  simulation.force("link")
      .links(graph.links);
​
  function ticked() {
    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("transform", function(d) {
          return "translate(" + d.x + "," + d.y + ")";
        })
  }
});
​
function dragstarted(d) {
  if (!d3.event.active) simulation.alphaTarget(0.3).restart();
  d.fx = d.x;
  d.fy = d.y;
}
​
function dragged(d) {
  d.fx = d3.event.x;
  d.fy = d3.event.y;
}
​
function dragended(d) {
  if (!d3.event.active) simulation.alphaTarget(0);
  d.fx = null;
  d.fy = null;
}
​
</script>
    