Created
April 10, 2012 09:07
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simple force-directed graph using d3
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| { | |
| "nodes": [ | |
| { | |
| "name": "Myriel", | |
| "group": 1 | |
| }, | |
| { | |
| "name": "Napoleon", | |
| "group": 1 | |
| }, | |
| { | |
| "name": "Napoleon", | |
| "group": 2 | |
| } | |
| ], | |
| "links": [ | |
| { | |
| "source": 1, | |
| "target": 0, | |
| "value": 1 | |
| }, | |
| { | |
| "source": 1, | |
| "target": 0, | |
| "value": 1 | |
| }, | |
| { | |
| "source": 1, | |
| "target": 2, | |
| "value": 1 | |
| } | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Force-Directed Layout</title> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script> | |
| <style type="text/css"> | |
| div.node { | |
| border-radius: 6px; | |
| width: 12px; | |
| height: 12px; | |
| margin: -6px 0 0 -6px; | |
| position: absolute; | |
| } | |
| div.link { | |
| position: absolute; | |
| border-bottom: solid #999 1px; | |
| height: 0; | |
| -webkit-transform-origin: 0 0; | |
| -moz-transform-origin: 0 0; | |
| -ms-transform-origin: 0 0; | |
| -o-transform-origin: 0 0; | |
| transform-origin: 0 0; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="chart"></div> | |
| <script type="text/javascript"> | |
| 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("#chart").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| d3.json("data.json", function(json) { | |
| force | |
| .nodes(json.nodes) | |
| .links(json.links) | |
| .start(); | |
| var link = svg.selectAll("line.link") | |
| .data(json.links) | |
| .enter().append("line") | |
| .attr("class", "link") | |
| .style("stroke-width", function(d) { return Math.sqrt(d.value); }); | |
| var node = svg.selectAll("circle.node") | |
| .data(json.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> | |
| </body> | |
| </html> |
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