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140 lines
4.8 KiB
140 lines
4.8 KiB
<!doctype html>
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<html>
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<head>
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<title>Graph | Groups</title>
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<style>
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body {font: 10pt arial;}
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</style>
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<script type="text/javascript" src="http://www.google.com/jsapi"></script>
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<script type="text/javascript" src="../../vis.js"></script>
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<script type="text/javascript">
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var nodes = null;
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var edges = null;
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var graph = null;
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google.load('visualization', '1');
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// Set callback to run when API is loaded
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google.setOnLoadCallback(draw);
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// Called when the Visualization API is loaded.
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function draw() {
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// Create and populate a data table.
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nodes = new google.visualization.DataTable();
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nodes.addColumn('number', 'id');
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nodes.addColumn('string', 'text');
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nodes.addColumn('number', 'group');
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edges = new google.visualization.DataTable();
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edges.addColumn('number', 'from');
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edges.addColumn('number', 'to');
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edges.addColumn('number', 'length');
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edges.addColumn('string', 'color');
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var color = 'gray';
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var len = undefined;
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// randomly create some nodes
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var nodeCount = parseInt(document.getElementById('nodeCount').value);
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var nodeOffset = 0;
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var groupMin = 0;
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var groupMax = parseInt(document.getElementById('groupCount').value);
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var group = groupMin;
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var groupLeader = new Array(); // will contain the node id with the most links of each group
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while (group < groupMax) {
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// randomly create some nodes
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var i = 0;
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var cols = parseInt(Math.sqrt(nodeCount));
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var connectionCount = new Array();
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while (i < nodeCount) {
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nodes.addRow([i + nodeOffset, i + nodeOffset + '', group]);
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connectionCount[i] = 0;
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// create links in a scale-free-graph way
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if (i == 1) {
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var from = i;
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var to = 0;
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edges.addRow([from + nodeOffset, to + nodeOffset, len, color]);
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connectionCount[from]++;
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connectionCount[to]++;
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}
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else if (i > 1) {
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var conn = (i - 1) * 2;
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var rand = Math.floor(Math.random() * conn);
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var cum = 0;
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var j = 0;
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while (j < connectionCount.length && cum < rand) {
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cum += connectionCount[j];
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j++;
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}
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var from = i;
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var to = j;
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edges.addRow([from + nodeOffset, to + nodeOffset, len, color]);
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connectionCount[from]++;
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connectionCount[to]++;
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}
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i++;
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}
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// calculate the node with the most number of connections
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var leader = 0;
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for (c in connectionCount) {
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if (connectionCount[c] > connectionCount[leader])
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leader = parseInt(c);
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}
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if (group > groupMin) {
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// connect to the leader of this group to the leader of a random other group
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var from = leader + nodeOffset;
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var to = groupLeader[groupMin + parseInt(Math.random() * (group - groupMin))];
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edges.addRow([from, to, len, color]);
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}
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// add this leader to the list
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groupLeader[group] = leader + nodeOffset;
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nodeOffset += nodeCount;
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group++;
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}
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// specify options
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var options = {
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width: '600px',
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height: '600px',
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stabilize: false,
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nodes: {
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style: 'dot'
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},
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edges: {
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length: 50
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}
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};
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// Instantiate our graph object.
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graph = new vis.Graph(document.getElementById('mygraph'));
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// Draw our graph with the created data and options
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graph.draw(nodes, edges, options);
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}
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</script>
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</head>
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<body>
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<form onsubmit= "javascript: draw(); return false;">
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Number of groups:
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<input type="text" value="6" id="groupCount" style="width: 50px;">
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Number of nodes per group:
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<input type="text" value="7" id="nodeCount" style="width: 50px;">
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<input type="submit" value="Go">
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</form>
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<br>
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<div id="mygraph"></div>
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<div id="info"></div>
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</body>
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</html>
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