title: draw a line chart using big array in highchart
body: <p>I am trying to draw a line chart using big array list of objects with id,named values but something is going wrong. I can see following warnings in firebug window :</p>
  
  <pre><code>Unexpected value NaN parsing y attribute.
  elem[setAttribute](prop, value);
  </code></pre>
  
  <p><a href="http://jsfiddle.net/stGXM/19/" rel="nofollow">http://jsfiddle.net/stGXM/19/</a></p>
  
  <p>Why do those warnings are coming? Currently chart is not getting drawn even though I have mentioned all the necessary values.</p>
  
  <p>Please help...</p>