Bar and line chart combination in dimple

by J. Albert Bowden

HTML

<div>From <a href="http://stackoverflow.com/questions/18620053/multi-series-in-dimplejs">http://stackoverflow.com/questions/18620053/multi-series-in-dimplejs</a></div>

<div id="chartContainer">
  <script src="http://d3js.org/d3.v3.min.js"></script>
  <script src="http://dimplejs.org/dist/dimple.v1.1.3.min.js"></script>
  <script type="text/javascript">
      var svg = dimple.newSvg("#chartContainer", 800, 400);

      // Data hack required to get revenue and profit on the same axis, units are
      // arbitrarily allocated to revenue but the values will be summed by date
      var data = [
          {"Month":"01/2013", "Metric":"Revenue", "Revenue/Profit":2000, "Units":4},
          {"Month":"02/2013", "Metric":"Revenue", "Revenue/Profit":3201, "Units":3},
          {"Month":"03/2013", "Metric":"Revenue", "Revenue/Profit":1940, "Units":5},
          {"Month":"04/2013", "Metric":"Revenue", "Revenue/Profit":2500, "Units":1},
          {"Month":"05/2013", "Metric":"Revenue", "Revenue/Profit":800, "Units":4},
          {"Month":"01/2013", "Metric":"Profit", "Revenue/Profit":2000, "Units":0},
          {"Month":"02/2013", "Metric":"Profit", "Revenue/Profit":2000, "Units":0},
          {"Month":"03/2013", "Metric":"Profit", "Revenue/Profit":14000, "Units":0},
          {"Month":"04/2013", "Metric":"Profit", "Revenue/Profit":3200, "Units":0},
          {"Month":"05/2013", "Metric":"Profit", "Revenue/Profit":1200, "Units":0}
      ];

      var chart = new dimple.chart(svg, data);
      chart.setBounds(60,20,680,330);

      // Add your x axis - nothing unusual here
      var x = chart.addCategoryAxis("x", "Month");
      // First y axis is the combination axis for revenue and profit
      var y1 = chart.addMeasureAxis("y", "Revenue/Profit");
      // Second is the units only
      var y2 = chart.addMeasureAxis("y", "Units");

      // Plot the bars first - the order of series determines their dom position
      // from back to front, this means bars are at the back. ...