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.
Last active
November 25, 2023 15:45
-
-
Save erkal/9746513 to your computer and use it in GitHub Desktop.
Random Graph Generator
This file contains 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.
Learn more about bidirectional Unicode characters
| <!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 n = 20, // number of nodes | |
| m = 22, // number of links | |
| charge = -1000; | |
| 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 3 + 3 * d.weight }) | |
| .style("fill", function (d) { return colors(d.weight) }); | |
| svgLinks.transition().duration(800) | |
| .style("stroke-width", 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> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Hello,
this gist appears to have no license. Maybe consider adding one?
Thanks,
~