The end result of my blog on SOM - Creating hexagonal heatmaps with D3.js in which the one heatmap of a Self Organizing Map is displayed with D3 with a small hover event
A version with line boundaries to separate the segments can be found here
Last active
June 27, 2023 15:27
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Self Organizing Map - Heatmap - D3
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| license: mit |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> | |
| <title>Self Organizing Maps</title> | |
| <script type="text/javascript" src="http://d3js.org/d3.v3.js"></script> | |
| <script type="text/javascript" src="http://d3js.org/d3.hexbin.v0.min.js"></script> | |
| <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.3/jquery.js"></script> | |
| <style type="text/css"> | |
| body { | |
| margin: 0px; | |
| overflow: hidden; | |
| font-family: "Helvetica Neue", Helvetica; | |
| font-size: 14px; | |
| } | |
| .header { | |
| margin-top: 20px; | |
| margin-left: 20px; | |
| font-size: 36px; | |
| font-weight: 300; | |
| display: block; | |
| z-index: 1; | |
| text-shadow: 0 1px 0 #fff; | |
| } | |
| .hint { | |
| width: 1280px; | |
| right: 0px; | |
| color: rgb(153, 153, 153); | |
| font-size: 12px; | |
| padding-bottom: 20px; | |
| } | |
| #chart{ | |
| text-align: center; | |
| } | |
| .hr-style { | |
| border: 0; | |
| height: 2px; | |
| width: 80%; | |
| color: #E8E8E8; | |
| background-color: #E8E8E8; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="header"> | |
| Self Organizing Maps | |
| <div class="hint">Heatmaps showing distributions per variable</div> | |
| </div> | |
| <div id="chart"></div> | |
| <script type="text/javascript" src="script.js"></script> | |
| </body> | |
| </html> |
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| //The color of each hexagon | |
| var color = ["#E9FF63", "#7DFF63", "#63F8FF", "#99FF63", "#CFFE63", "#FFC263", "#FFC763", "#FF8E63", "#FF6464", "#FF7563", "#FF6364", "#FF7F63", "#FFE963", "#E3FF63", "#FFD963", "#FFE263", "#BAFF63", "#6BFF63", "#64FF69", "#71FF63", "#63FF6C", "#63FFD8", "#64FF69", "#63FF9A", "#FDFC63", "#88FF63", "#66FF64", "#A6FF63", "#63FFDB", "#63D9FE", "#90FF63", "#FF9B63", "#FF7263", "#9DFF63", "#E5FF63", "#FF7F63", "#FF7463", "#FFAE63", "#F4FF63", "#FFEC63", "#FBFF63", "#FFE663", "#FFC263", "#9DFF63", "#AEFF63", "#6AFF63", "#65FF65", "#63FFC7", "#C5FF63", "#63FFBE", "#63FF93", "#63FFAC", "#62FF79", "#90FF63", "#6AFF63", "#63FFEF", "#63F7FF", "#63FFD1", "#6370FF", "#638DFF", "#63FFDF", "#C5FF63", "#63FF6A", "#64FF69", "#C7FE63", "#FDFC63", "#D0FE63", "#FFDC63", "#E3FF63", "#DCFF63", "#C9FE63", "#FBFF63", "#FFB663", "#D9FF63", "#9DFF63", "#69FF63", "#DCFF63", "#63FFD4", "#63FFB8", "#64FF67", "#74FF63", "#63FCFF", "#63FFF9", "#63FFE9", "#A6FF63", "#63FFCD", "#63CEFE", "#63FBFF", "#63FFFB", "#637CFF", "#6379FF", "#D2FE63", "#CFFE63", "#63FF6E", "#65FF65", "#EEFF63", "#DCFF63", "#9DFF63", "#AAFF63", "#B6FF63", "#D0FE63", "#AEFF63", "#CDFE63", "#64FF67", "#99FF63", "#66FF64", "#63FFC1", "#63FFD4", "#63FF90", "#63FFD1", "#63FFF4", "#63FFEC", "#63FFF9", "#71FF63", "#63FF93", "#63FFC4", "#63F7FF", "#638DFF", "#63E9FF", "#6375FF", "#88FF63", "#95FF63", "#63FFAF", "#63FF93", "#63FF9A", "#9DFF63", "#88FF63", "#EEFF63", "#BDFF63", "#71FF63", "#B6FF63", "#80FF63", "#62FF82", "#63FF6C", "#62FF76", "#63FF6E", "#63FFCD", "#63EFFF", "#63FFF6", "#63FFB5", "#63FFFC", "#63B4FF", "#63FFC1", "#63F5FF", "#63FFB5", "#63FFBB", "#63FFFC", "#6379FF", "#63B0FF", "#63FFBB", "#D5FE63", "#63FFB8", "#63FF6C", "#62FF7C", "#63FFBE", "#FFDF63", "#FFE263", "#FFE963", "#76FF63", "#67FF64", "#63FF90", "#65FF65", "#63FFA0", "#63FFA6", "#62FF73", "#63FFC1", "#63FFC4", "#63FFF9", "#63CEFE", "#63A4FF", "#6373FF", "#63C5FE", "#638DFF", "#63FF9D", "#6387FF", "#63FFBE", "#63FEFE", "#63FFEC", "#63FFF1", "#638DFF", "#FF6A64", "#FBFF63", "#FFEF63", "#63FFE9", "#62FF8C", "#BAFF63", "#FFAB63", "#FFCB63", "#62FF82", "#88FF63", "#63FFB2", "#63FFC1", "#63FFDF", "#63FFB5", "#63FFB5", "#62FF7F", "#63FFC4", "#63ECFF", "#63FFFC", "#63F3FF", "#63FFE5", "#63D2FE", "#63FFF6", "#63A8FF", "#63F8FF", "#63FFFB", "#63E4FF", "#636DFF", "#63FFC4", "#6387FF", "#FF8B63", "#EBFF63", "#C5FF63", "#BDFF63", "#62FF76", "#DCFF63", "#BDFF63", "#99FF63", "#62FF82", "#63FFA6", "#63C9FE", "#63FEFE", "#62FF89", "#63FFD8", "#63FFB8", "#63FFF1", "#63C1FE", "#63FCFF", "#63FFCA", "#63C9FE", "#63FFFC", "#6FFF63", "#63FFE5", "#63E9FF", "#63F7FF", "#63B0FF", "#636CFF", "#636CFF", "#63ACFF", "#63F1FF", "#FF8863", "#FF6864", "#FFB363", "#A2FF63", "#63FFD8", "#63FF96", "#99FF63", "#AEFF63", "#C7FE63", "#63FF93", "#63FFC1", "#63FFF9", "#63FFFB", "#67FF64", "#B2FF63", "#62FF76", "#62FF73", "#639CFF", "#63FFC1", "#63FFEF", "#66FF64", "#62FF76", "#63FFC4", "#63FFCA", "#63FFBE", "#63FFFC", "#6363FF", "#63ACFF", "#6375FF", "#63CEFE", "#FFB663", "#79FF63", "#BDFF63", "#63FF6C", "#66FF64", "#76FF63", "#FEF763", "#D7FE63", "#7DFF63", "#63FFB8", "#63F5FF", "#63F7FF", "#62FF7F", "#63FFA6", "#62FF76", "#63FFA6", "#63FFD1", "#63FEFE", "#63FFDF", "#63F8FF", "#63FF96", "#63FFA9", "#63FFA9", "#63C1FE", "#63FFC1", "#63D6FE", "#636EFF", "#6364FF", "#6370FF", "#6398FF", "#FFE663", "#C0FF63", "#EBFF63", "#C5FF63", "#D2FE63", "#69FF63", "#6FFF63", "#D4FE63", "#F4FF63", "#63FFC4", "#62FF89", "#63FFF4", "#63FFB8", "#63FFF4", "#63F8FF", "#62FF71", "#63FFBB", "#63FFEF", "#63FFF1", "#63FBFF", "#63C1FE", "#63FFDF", "#63FFD1", "#63FFE2", "#63ACFF", "#63F3FF", "#63DDFF", "#63FFF6", "#63D6FE", "#63CEFE", "#D4FE63", "#80FF63", "#FF8B63", "#D5FE63", "#63FFCA", "#90FF63", "#D7FE63", "#FBFF63", "#62FF7C", "#C9FE63", "#76FF63", "#69FF63", "#62FF7C", "#63FFD4", "#63FFA6", "#6BFF63", "#63FFC7", "#63E4FF", "#62FF7C", "#63FFF6", "#6379FF", "#63FFCD", "#63FFCA", "#63FFEF", "#63FFBE", "#63E9FF", "#63ECFF", "#63FFF9", "#63E0FF", "#63C5FE", "#FF6B63", "#FFD663", "#63FF6E", "#63FFB2", "#FFD663", "#62FF7F", "#63FFA6", "#9DFF63", "#F6FF63", "#95FF63", "#95FF63", "#FFD963", "#DCFF63", "#63FF90", "#63FFD1", "#63FFFC", "#63FFA3", "#63FFAF", "#63ECFF", "#63FFEF", "#63C5FE", "#63FDFF", "#63FF93", "#62FF76", "#69FF63", "#63EFFF", "#636DFF", "#6379FF", "#63E7FF", "#63E7FF", "#FF8E63", "#CDFE63", "#BDFF63", "#F9FF63", "#62FF7F", "#63FFE2", "#62FF86", "#67FF64", "#63FFA3", "#6DFF63", "#9DFF63", "#FFE963", "#FFBE63", "#6AFF63", "#62FF7F", "#63FFD4", "#79FF63", "#63D2FE", "#63DDFF", "#63FEFE", "#63BDFE", "#63FFDB", "#64FF69", "#62FF8C", "#63FFD8", "#63BDFE", "#63B8FF", "#6391FF", "#63FFDB", "#63FEFE", "#F8FF63", "#FFF263", "#C2FF63", "#FFDF63", "#D2FE63", "#64FF69", "#63FFE2", "#7DFF63", "#FDFC63", "#FF9763", "#6BFF63", "#F2FF63", "#FBFF63", "#AEFF63", "#80FF63", "#63D9FE", "#63FFBB", "#63FFD8", "#63FFEF", "#63C5FE", "#63FF90", "#62FF89", "#63D2FE", "#63FFC4", "#63FF93", "#63D2FE", "#63DDFF", "#63FDFF", "#6DFF63", "#62FF82", "#FF8363", "#DAFF63", "#74FF63", | |
| "#63FF6A", "#63FF6A", "#64FF69", "#FFDF63", "#FF7F63", "#FFEF63", "#EEFF63", "#CFFE63", "#6AFF63", "#95FF63", "#63FF6C", "#63FF90", "#6BFF63", "#63FF90", "#63FFCA", "#63E9FF", "#63FFEC", "#63FFAC", "#63FFD4", "#63FAFF", "#63FFCA", "#63ECFF", "#62FF8C", "#63FFE5", "#69FF63", "#FF7463", "#FF9463", "#E0FF63", "#FFCB63", "#A6FF63", "#63FF93", "#E0FF63", "#FEFA63", "#EBFF63", "#AAFF63", "#C2FF63", "#D4FE63", "#63FFAC", "#65FF65", "#62FF73", "#63FFE9", "#65FF66", "#95FF63", "#62FF7F", "#63FFB5", "#63D2FE", "#63FFAC", "#63FFFB", "#62FF8C", "#64FF69", "#99FF63", "#63FFB2", "#63FFDF", "#63FFB8", "#BAFF63", "#FFDC63", "#62FF76", "#BDFF63", "#C2FF63", "#95FF63", "#F6FF63", "#FFA163", "#CFFE63", "#63FFE9", "#84FF63", "#6BFF63", "#6DFF63", "#63FFC1", "#D0FE63", "#69FF63", "#63FFC1", "#62FF8C", "#63FFBB", "#63FF96", "#63FAFF", "#63FFEC", "#63FEFE", "#62FF76", "#63FF9A", "#FFC563", "#6FFF63", "#63FFAF", "#63F5FF", "#63F1FF", "#63FF6A", "#62FF7C", "#63F8FF", "#9DFF63", "#99FF63", "#AEFF63", "#FF8363", "#FFC963", "#62FF79", "#63FF90", "#63FF6A", "#63FCFF", "#63E9FF", "#63FFA0", "#64FF67", "#FFD463", "#A6FF63", "#CBFE63", "#63FF90", "#63FFC4", "#63C9FE", "#63FFE5", "#63FFDB", "#62FF89", "#63FFD8", "#79FF63", "#63FF9A", "#63FAFF", "#63E9FF", "#63FF6E", "#63F7FF", "#63E4FF", "#63F5FF", "#64FF67", "#C9FE63", "#FFBA63", "#D9FF63", "#63FFD1", "#63FFF6", "#63FF93", "#C0FF63", "#F6FF63", "#62FF82", "#AEFF63", "#CBFE63", "#FF8363", "#63FF6A", "#63FFCD", "#63F7FF", "#63FFF9", "#63FFC4", "#63FFC4", "#95FF63", "#63FFCD", "#A2FF63", "#EBFF63", "#63FFC1", "#63FFA0", "#63E4FF", "#63FFFB", "#63F3FF", "#63CEFE", "#63FBFF"] | |
| /////////////////////////////////////////////////////////////////////////// | |
| ////////////// Initiate SVG and create hexagon centers //////////////////// | |
| /////////////////////////////////////////////////////////////////////////// | |
| //Function to call when you mouseover a node | |
| function mover(d) { | |
| var el = d3.select(this) | |
| .transition() | |
| .duration(10) | |
| .style("fill-opacity", 0.3) | |
| ; | |
| } | |
| //Mouseout function | |
| function mout(d) { | |
| var el = d3.select(this) | |
| .transition() | |
| .duration(1000) | |
| .style("fill-opacity", 1) | |
| ; | |
| }; | |
| //svg sizes and margins | |
| var margin = { | |
| top: 30, | |
| right: 20, | |
| bottom: 20, | |
| left: 50 | |
| }; | |
| var width = 850; | |
| var height = 350; | |
| //The number of columns and rows of the heatmap | |
| var MapColumns = 30, | |
| MapRows = 20; | |
| //The maximum radius the hexagons can have to still fit the screen | |
| var hexRadius = d3.min([width/((MapColumns + 0.5) * Math.sqrt(3)), | |
| height/((MapRows + 1/3) * 1.5)]); | |
| //Set the new height and width of the SVG based on the max possible | |
| width = MapColumns*hexRadius*Math.sqrt(3); | |
| heigth = MapRows*1.5*hexRadius+0.5*hexRadius; | |
| //Set the hexagon radius | |
| var hexbin = d3.hexbin() | |
| .radius(hexRadius); | |
| //Calculate the center positions of each hexagon | |
| var points = []; | |
| for (var i = 0; i < MapRows; i++) { | |
| for (var j = 0; j < MapColumns; j++) { | |
| var x = hexRadius * j * Math.sqrt(3) | |
| //Offset each uneven row by half of a "hex-width" to the right | |
| if(i%2 === 1) x += (hexRadius * Math.sqrt(3))/2 | |
| var y = hexRadius * i * 1.5 | |
| points.push([x,y]) | |
| }//for j | |
| }//for i | |
| //Create SVG element | |
| var svg = d3.select("#chart").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| /////////////////////////////////////////////////////////////////////////// | |
| ////////////////////// Draw hexagons and color them /////////////////////// | |
| /////////////////////////////////////////////////////////////////////////// | |
| //Start drawing the hexagons | |
| svg.append("g") | |
| .selectAll(".hexagon") | |
| .data(hexbin(points)) | |
| .enter().append("path") | |
| .attr("class", "hexagon") | |
| .attr("d", function (d) { | |
| return "M" + d.x + "," + d.y + hexbin.hexagon(); | |
| }) | |
| .attr("stroke", function (d,i) { | |
| return "#fff"; | |
| }) | |
| .attr("stroke-width", "1px") | |
| .style("fill", function (d,i) { | |
| return color[i]; | |
| }) | |
| .on("mouseover", mover) | |
| .on("mouseout", mout) | |
| ; |
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