title: zeppelin with sparkr is not displaying dataframe as table
body: <p>The zeppelin R interpreter documentation states:</p>
  
  <pre><code>If you return a data.frame, Zeppelin will attempt to display it using Zeppelin's built-in visualizations.
  </code></pre>
  
  <p>This can be seen in the documentation example:</p>
  
  <p><a href="https://i.stack.imgur.com/UNPdI.png" rel="noreferrer"><img src="https://i.stack.imgur.com/UNPdI.png" alt="enter image description here"></a></p>
  
  <p>However, when I attempt to run the same R commands from my zeppelin 0.6.0 notebook, I see the following:</p>
  
  <p><a href="https://i.stack.imgur.com/r98tQ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/r98tQ.png" alt="enter image description here"></a></p>
  
  <p>Any idea why I'm not seeing the tabular output?</p>