<!-- Include the CanvasXpress library in your HTML file -->
<link rel="stylesheet" href="https://www.canvasxpress.org/dist/canvasXpress.css" type="text/css"/>
<script src="https://www.canvasxpress.org/canvasXpress.min.js"></script>


<!-- Create a canvas element for the chart with the desired dimensions -->
<div>
  <canvas id="canvasId" width="600" height="600"</canvas>
</div>


<!-- Create a script to initialize the chart -->
<script>

  <!-- Create the data for the graph -->
  var data = {
     "y" : {
        "data" : [
          [1,2,3,4,5,6,7,8,9,10],
          [10,9,8,7,6,5,4,3,2,1],
          [1,2,3,4,5,6,7,8,9,10],
          [10,9,8,7,6,5,4,3,2,1],
          [1,2,3,4,5,6,7,8,9,10]
        ],
        "smps" : ["S1","S2","S3","S4","S5","S6","S7","S8","S9","S10"],
        "vars" : ["V1","V2","V3","V4","V5"]
     }
  }
  
  
  <-- Create the configuration for the graph -->
  var config = {
     "colorSpectrum":[
        "#f0f0f0",
        "#bdbdbd",
        "#636363",
        "#000000"
     ],
     "graphType":"Heatmap",
     "showHeatmapIndicator":"false",
     "showLegend":"false",
     "sizeBy":"Size",
     "sizeByContinuous":"true",
     "sizeByData":"data",
     "title":"A good old Northern Blot"
  }
  

  <!-- Call the CanvasXpress function to create the graph -->
  var cX = new CanvasXpress("canvasId", data, config);


</script>