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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<script src="http://d3js.org/d3.v3.js"></script> |
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<style> |
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path.link { |
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fill: none; |
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stroke: #666; |
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stroke-width: 1.5px; |
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} |
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path.link.twofive { |
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opacity: 0.25; |
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} |
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path.link.fivezero { |
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opacity: 0.50; |
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} |
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path.link.sevenfive { |
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opacity: 0.75; |
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} |
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path.link.onezerozero { |
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opacity: 1.0; |
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} |
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circle { |
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fill: #ccc; |
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stroke: #fff; |
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stroke-width: 1.5px; |
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} |
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text { |
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fill: #000; |
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font: 10px sans-serif; |
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pointer-events: none; |
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} |
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</style> |
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<body> |
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<script> |
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// get the data |
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d3.csv("force.csv", function(error, links) { |
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var nodes = {}; |
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// Compute the distinct nodes from the links. |
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links.forEach(function(link) { |
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link.source = nodes[link.source] || |
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(nodes[link.source] = {name: link.source}); |
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link.target = nodes[link.target] || |
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(nodes[link.target] = {name: link.target}); |
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link.value = +link.value; |
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}); |
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var width = 960, |
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height = 500, |
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color = d3.scale.category20c(); |
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var force = d3.layout.force() |
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.nodes(d3.values(nodes)) |
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.links(links) |
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.size([width, height]) |
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.linkDistance(60) |
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.charge(-300) |
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.on("tick", tick) |
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.start(); |
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// Set the range |
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var v = d3.scale.linear().range([0, 100]); |
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// Scale the range of the data |
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v.domain([0, d3.max(links, function(d) { return d.value; })]); |
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// asign a type per value to encode opacity |
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links.forEach(function(link) { |
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if (v(link.value) <= 25) { |
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link.type = "twofive"; |
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} else if (v(link.value) <= 50 && v(link.value) > 25) { |
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link.type = "fivezero"; |
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} else if (v(link.value) <= 75 && v(link.value) > 50) { |
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link.type = "sevenfive"; |
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} else if (v(link.value) <= 100 && v(link.value) > 75) { |
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link.type = "onezerozero"; |
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} |
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}); |
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var svg = d3.select("body").append("svg") |
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.attr("width", width) |
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.attr("height", height); |
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// build the arrow. |
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svg.append("svg:defs").selectAll("marker") |
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.data(["end"]) // Different link/path types can be defined here |
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.enter().append("svg:marker") // This section adds in the arrows |
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.attr("id", String) |
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.attr("viewBox", "0 -5 10 10") |
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.attr("refX", 15) |
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.attr("refY", -1.5) |
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.attr("markerWidth", 6) |
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.attr("markerHeight", 6) |
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.attr("orient", "auto") |
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.append("svg:path") |
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.attr("d", "M0,-5L10,0L0,5"); |
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// add the links and the arrows |
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var path = svg.append("svg:g").selectAll("path") |
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.data(force.links()) |
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.enter().append("svg:path") |
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.attr("class", function(d) { return "link " + d.type; }) |
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.attr("marker-end", "url(#end)"); |
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// define the nodes |
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var node = svg.selectAll(".node") |
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.data(force.nodes()) |
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.enter().append("g") |
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.attr("class", "node") |
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.on("click", click) |
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.on("dblclick", dblclick) |
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.call(force.drag); |
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// add the nodes |
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node.append("circle") |
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.attr("r", 16) |
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.style("fill", function(d) { return color(d.name); }); |
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// add the text |
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node.append("text") |
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.attr("dy", ".35em") |
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.style("stroke", "lightsteelblue") |
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.style("stroke-width", ".5px") |
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.style("font", "10px sans-serif") |
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.text(function(d) { return d.name; }); |
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// add the curvy lines |
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function tick() { |
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path.attr("d", function(d) { |
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var dx = d.target.x - d.source.x, |
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dy = d.target.y - d.source.y, |
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dr = Math.sqrt(dx * dx + dy * dy); |
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return "M" + |
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d.source.x + "," + |
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d.source.y + "A" + |
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dr + "," + dr + " 0 0,1 " + |
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d.target.x + "," + |
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d.target.y; |
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}); |
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node |
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.attr("transform", function(d) { |
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return "translate(" + d.x + "," + d.y + ")"; }); |
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} |
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}); |
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</script> |
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</body> |
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</html> |
