title: Creating a multiple y-axis combo chart
body: <p>I'm looking at further improving a combo chart I created here by making it first a dual y axis combo chart then a multiple axis combo chart.</p>
  
  <p>As seen <a href="https://jsfiddle.net/S5bKq/1304/" rel="nofollow noreferrer">here</a> I've figured out how to create a basic combo chart using the tutorial.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>google.load("visualization", "1", {
      packages: [ "corechart", "bar" ]
  });
  
  google.setOnLoadCallback(drawVisualization);
  
  function drawVisualization() {
      // Some raw data (not necessarily accurate)
      var data = google.visualization.arrayToDataTable([
          [ 'Month', 'Col1', 'Col2', 'Col3', 'Col4', 'Col5', 'Col6' ],
          [ 'Set 1', 165, 938, 522, 998, 450, 614.6 ],
          [ 'Set 2', 135, 1120, 599, 1268, 288, 682 ],
          [ 'Set 3', 157, 1167, 587, 807, 397, 623 ],
          [ 'Set 4', 139, 1110, 615, 968, 215, 609.4 ],
          [ 'Set 5', 136, 691, 629, 1026, 366, 569.6 ]
      ]);
  
      var options = {
          title: 'Chart title',
          width: 1001,
          height: 500,
          vAxis: {
              title: "VAxis title"
          },
          hAxis: {
              title: "HAxis title"
          },
          seriesType: "bars",
          series: {
              5: {
                  type: "line"
              }
          }
      };
  
      var chart = new google.visualization.ComboChart(document.getElementById('number_format_chart'));
      chart.draw(data, options);
  }</code></pre>
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.chartwrapper {
      margin: 20px 0 12px 0;
  }
  #number_format_chart {
      width: 100%
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://www.google.com/jsapi"&gt;&lt;/script&gt;
  &lt;div class="chartwrapper"&gt;
      &lt;!--Div that will hold the bar charts --&gt;
      &lt;div id="number_format_chart"&gt;&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Now moving on to changing the plain combo chart to a dual y version this is what I'm trying to achieve.</p>
  
  <p><img src="https://i.stack.imgur.com/lnWDa.png" alt="enter image description here"></p>
  
  <p>I thought adding the code below would help but no luck as the 2nd y axis isn't displayed</p>
  
  <pre><code>series: {
      0: { axis: 'Col1' }, // Bind series 0 to an axis named 'distance'.
      1: { axis: 'Col2' } // Bind series 1 to an axis named 'brightness'.
  },
  axes: {
      y: {
          Col1: {
              label: 'leftyaxis'
          }, // Left y-axis.
          Col2: {
              side: 'right',
              label: 'rightyaxis'
          } // Right y-axis.
      }
  }
  </code></pre>
  
  <p>Any help is appreciated</p>