Click anywhere to generate a new random graph.
- The nodes are colored by the number of their neighbors.
- Nodes with higher number of neighbours are bigger.
forked from erkal's block: Random Graph Generator
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Save elsewares/36855264fbd84e97c2eb81a93cd16c91 to your computer and use it in GitHub Desktop.
Random Graph Generator
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| license: mit |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .link {stroke: black;} | |
| .node {stroke: white; stroke-width: 3px;} | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script> | |
| var width = 960, height = 500 | |
| //colors = d3.scale.category10(); | |
| var colors = d3.scale.ordinal() | |
| .domain([0,10]) | |
| .range(["#2c7bb6", "#00a6ca","#00ccbc","#90eb9d","#f9d057","#f29e2e","#e76818","#d7191c"]); | |
| var n = 80, // number of nodes | |
| m = 80, // number of links | |
| charge = -100; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .on("mousedown", create); | |
| create(); | |
| function create () { | |
| svg.selectAll(".link, .node").remove(); | |
| randomGraph(n, m, charge); | |
| } | |
| function randomGraph (n, m, charge) { //creates a random graph on n nodes and m links | |
| var nodes = d3.range(n).map(Object), | |
| list = randomChoose(unorderedPairs(d3.range(n)), m), | |
| links = list.map(function (a) { return {source: a[0], target: a[1]} }); | |
| var force = d3.layout.force() | |
| .size([width, height]) | |
| .nodes(nodes) | |
| .links(links) | |
| .charge(charge) | |
| .on("tick", tick) | |
| .start(); | |
| var svgLinks = svg.selectAll(".link").data(links) | |
| .enter().append("line") | |
| .attr("class", "link"); | |
| var svgNodes = svg.selectAll(".node").data(nodes) | |
| .enter().append("circle") | |
| .attr("class", "node") | |
| .attr("r", 3) | |
| .style("fill", "white"); | |
| svgNodes.transition().duration(800) | |
| .attr("r", function (d) { return 8+(d.weight* d.weight*2) }) | |
| .style("fill", function (d) { return colors(d.weight) }) | |
| .style("opacity",.3); | |
| svgLinks.transition().duration(800) | |
| .style("stroke-width", 1) | |
| .style("opacity",.3); | |
| function tick () { | |
| svgNodes | |
| .attr("cx", function(d) { return d.x }) | |
| .attr("cy", function(d) { return d.y }); | |
| svgLinks | |
| .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 }); | |
| } | |
| } | |
| function randomChoose (s, k) { // returns a random k element subset of s | |
| var a = [], i = -1, j; | |
| while (++i < k) { | |
| j = Math.floor(Math.random() * s.length); | |
| a.push(s.splice(j, 1)[0]); | |
| }; | |
| return a; | |
| } | |
| function unorderedPairs (s) { // returns the list of all unordered pairs from s | |
| var i = -1, a = [], j; | |
| while (++i < s.length) { | |
| j = i; | |
| while (++j < s.length) a.push([s[i],s[j]]) | |
| }; | |
| return a; | |
| } | |
| </script> |
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