title: Display Different Number of Groups in Highcharts Stacked Column Graph
body: <p>I am trying to create a column highchart that is stacked and grouped, but I only want the last few x-values to have multiple groups/stacks.  The first x-values only have one group/stack. </p>
  
  <p>To explain, I am charting historical values and then comparing optimistic and conservative forecast scenarios.</p>
  
  <p>Here is my <a href="http://jsfiddle.net/ehulburd/uBuLu/4/" rel="nofollow">jsFiddle</a>.  A better way to do this?</p>
  
  <pre><code> series: [{
              name: 'Thermal',
              data: [5, 3, 4, 5],
              stack: 'conservative',
              color:'blue'
          }, {
              name: 'PV',
              data: [3, 4, 4, 6],
              stack: 'conservative',
              color: 'red'
          }, {
              name: 'Thermal',
              data: [0, 0, 0, 10],
              stack: 'optimistic',
              color: 'blue',
              showInLegend: false
          }, {
              name: 'PV',
              data: [0,0,0, 12],
              stack: 'optimistic',
              color: 'red',
              showInLegend: false
          }]
  </code></pre>