title: Working of setSelectionFrom: to: anchor: highlight:?
body: <p>I would like to know the working of the following NSMatrix method.<br>
  I'm not actually getting as mentioned in below link:   </p>
  
  <p><a href="http://www.cocoabuilder.com/archive/cocoa/14308-nsmatrix-selecting-multiple-cells-programmatically.html" rel="nofollow">NSMatrix - Selecting multiple cells programmatically</a></p>
  
  <pre><code>[aButtonMatrix setSelectionFrom:2 to:3 anchor:2 highlight:YES];   
  </code></pre>