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forced_layout.html
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forced_layout.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>D3: Forced Layout chart</title>
<script type="text/javascript" src="../d3/d3.js"></script>
<style type="text/css">
</style>
</head>
</head>
<body>
<script type="text/javascript">
var w = 500;
var h = 300;
//D3’s force layout expects us to provide nodes and edges separately, as arrays of objects.
var dataset = {
nodes: [
{ name: "Adam" },
{ name: "Bob" },
{ name: "Carrie" },
{ name: "Donovan" },
{ name: "Edward" },
{ name: "Felicity" },
{ name: "George" },
{ name: "Hannah" },
{ name: "Iris" },
{ name: "Jerry" }
],
edges: [
{ source: 0, target: 1 },
{ source: 0, target: 2 },
{ source: 0, target: 3 },
{ source: 0, target: 4 },
{ source: 1, target: 5 },
{ source: 2, target: 5 },
{ source: 2, target: 5 },
{ source: 3, target: 4 },
{ source: 5, target: 8 },
{ source: 5, target: 9 },
{ source: 6, target: 7 },
{ source: 7, target: 8 },
{ source: 8, target: 9 }
]
};
//Initializing a forced layout
var force = d3.layout.force()
.nodes(dataset.nodes)
.links(dataset.edges)
.size([w, h])
.linkDistance([50])
.charge([-100])
.start();
//Colors
var colors = d3.scale.category10();
//Creating the SVG element
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
//Creating an SVG line for each edge
var edges = svg.selectAll("line")
.data(dataset.edges)
.enter()
.append("line")
.style("stroke", "#ccc")
.style("stroke-width", 1);
//Create nodes as circles
var nodes = svg.selectAll("circle")
.data(dataset.nodes)
.enter()
.append("circle")
.attr("r", 10)
.style("fill", function(d, i) {
return colors(i);
})
.call(force.drag);
//Every time the simulation "ticks", this will be called
force.on("tick", function() {
edges.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; });
nodes.attr("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
});
</script>
</body>
</html>