vis.js is a dynamic, browser-based visualization library
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  1. <!doctype html>
  2. <html>
  3. <head>
  4. <title>Graph | Random nodes</title>
  5. <style type="text/css">
  6. body {
  7. font: 10pt sans;
  8. }
  9. #mygraph {
  10. width: 600px;
  11. height: 600px;
  12. border: 1px solid lightgray;
  13. }
  14. </style>
  15. <script type="text/javascript" src="../../vis.js"></script>
  16. <script type="text/javascript">
  17. var nodes = null;
  18. var edges = null;
  19. var graph = null;
  20. function draw() {
  21. nodes = [];
  22. edges = [];
  23. var connectionCount = [];
  24. // randomly create some nodes and edges
  25. var nodeCount = document.getElementById('nodeCount').value;
  26. for (var i = 0; i < nodeCount; i++) {
  27. nodes.push({
  28. id: i,
  29. label: String(i)
  30. });
  31. connectionCount[i] = 0;
  32. // create edges in a scale-free-graph way
  33. if (i == 1) {
  34. var from = i;
  35. var to = 0;
  36. edges.push({
  37. from: from,
  38. to: to
  39. });
  40. connectionCount[from]++;
  41. connectionCount[to]++;
  42. }
  43. else if (i > 1) {
  44. var conn = edges.length * 2;
  45. var rand = Math.floor(Math.random() * conn);
  46. var cum = 0;
  47. var j = 0;
  48. while (j < connectionCount.length && cum < rand) {
  49. cum += connectionCount[j];
  50. j++;
  51. }
  52. var from = i;
  53. var to = j;
  54. edges.push({
  55. from: from,
  56. to: to
  57. });
  58. connectionCount[from]++;
  59. connectionCount[to]++;
  60. }
  61. }
  62. // create a graph
  63. var container = document.getElementById('mygraph');
  64. var data = {
  65. nodes: nodes,
  66. edges: edges
  67. };
  68. var options = {
  69. nodes: {
  70. shape: 'circle'
  71. },
  72. edges: {
  73. length: 50
  74. },
  75. stabilize: false
  76. };
  77. graph = new vis.Graph(container, data, options);
  78. // add event listeners
  79. vis.events.addListener(graph, 'select', function(params) {
  80. document.getElementById('selection').innerHTML =
  81. 'Selection: ' + JSON.stringify(graph.getSelection());
  82. });
  83. }
  84. </script>
  85. </head>
  86. <body onload="draw();">
  87. <form onsubmit="draw(); return false;">
  88. <label for="nodeCount">Number of nodes:</label>
  89. <input id="nodeCount" type="text" value="25" style="width: 50px;">
  90. <input type="submit" value="Go">
  91. </form>
  92. <br>
  93. <div id="mygraph"></div>
  94. <p id="selection"></p>
  95. </body>
  96. </html>