title: Renderer function for ExtJS chart series
body: <p>I am using ExtJS series renderer function to set the <code>fill</code> property of scatter chart, instead of using <code>markerConfig</code> property. Since I want to fill different color for each points. Its working fine.</p>
  
  <pre><code>renderer : function(sprite, record, attr, index, store) {
     Ext.apply(attr, {
         fill : '#F00'
     }
  }
  </code></pre>
  
  <p>But I want to set the <code>type</code> property, so that each point will show in different types like circle, cross, plus, diamond and so on. It is not working. And radius of the scatter point, I am unable to set the property in renderer function.</p>
  
  <p>How do I do that in the renderer function?</p>