title: how to combine google charts with ngTable
body: <p>I am trying to combine googlecharts with ngTable.</p>
  
  <p>This is my chart:
  <a href="http://plnkr.co/edit/RB2G4zjwaTKrrrRVdyFz?p=preview" rel="nofollow">http://plnkr.co/edit/RB2G4zjwaTKrrrRVdyFz?p=preview</a>. 
  The data for the chart, I want to get them from this table: <a href="http://bazalt-cms.com/ng-table/example/21" rel="nofollow">http://bazalt-cms.com/ng-table/example/21</a></p>
  
  <p>To explain it better, in plnkr I've manually entered the data of the chart based to the example of ngTable (grouping by role: admin 4, user 12, moderator 7). </p>
  
  <ul>
  <li><em>(a) group.data.length</em> -> provides me each <em>4, 12, 7</em>  </li>
  <li><em>(b) group.value</em> -> provides me each <em>admin, user, moderator</em></li>
  </ul>
  
  <p>The big question is: how can I pass this data to the chart? how can I explain <em>chart.draw($scope.data, options);</em> it should take my data from (a) and (b) to create the chart.</p>