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- <!doctype html>
- <html>
- <head>
- <title>Graph | Random nodes</title>
-
- <style type="text/css">
- body {
- font: 10pt sans;
- }
- #mygraph {
- width: 600px;
- height: 600px;
- border: 1px solid lightgray;
- }
- </style>
-
- <script type="text/javascript" src="../../vis.js"></script>
-
- <script type="text/javascript">
- var nodes = null;
- var edges = null;
- var graph = null;
-
- function draw() {
- nodes = [];
- edges = [];
- var connectionCount = [];
-
- // randomly create some nodes and edges
- var nodeCount = document.getElementById('nodeCount').value;
- for (var i = 0; i < nodeCount; i++) {
- nodes.push({
- id: i,
- label: String(i)
- });
-
- connectionCount[i] = 0;
-
- // create edges in a scale-free-graph way
- if (i == 1) {
- var from = i;
- var to = 0;
- edges.push({
- from: from,
- to: to
- });
- connectionCount[from]++;
- connectionCount[to]++;
- }
- else if (i > 1) {
- var conn = edges.length * 2;
- var rand = Math.floor(Math.random() * conn);
- var cum = 0;
- var j = 0;
- while (j < connectionCount.length && cum < rand) {
- cum += connectionCount[j];
- j++;
- }
-
- var from = i;
- var to = j;
- edges.push({
- from: from,
- to: to
- });
- connectionCount[from]++;
- connectionCount[to]++;
- }
- }
-
- // create a graph
- var container = document.getElementById('mygraph');
- var data = {
- nodes: nodes,
- edges: edges
- };
- var options = {
- nodes: {
- shape: 'circle'
- },
- edges: {
- length: 50
- },
- stabilize: false
- };
- graph = new vis.Graph(container, data, options);
-
- // add event listeners
- vis.events.addListener(graph, 'select', function(params) {
- document.getElementById('selection').innerHTML =
- 'Selection: ' + graph.getSelection();
- });
- }
- </script>
- </head>
-
- <body onload="draw();">
-
- <form onsubmit="draw(); return false;">
- <label for="nodeCount">Number of nodes:</label>
- <input id="nodeCount" type="text" value="25" style="width: 50px;">
- <input type="submit" value="Go">
- </form>
- <br>
-
- <div id="mygraph"></div>
-
- <p id="selection"></p>
- </body>
- </html>
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