title: Google Analytics creating custom variables from other custom variables using _setCustomVar
body: <p>I am setting up some custom variables with Google Analytics using <code>_setCustomVar</code>. I have seen some documentation (<em>not official</em>) that uses the syntax <code>P1:P2:P3</code> to populate the value of a custom variable. I cannot find conclusive evidence in the Google Developers documentation that suggests that the value of <code>P1:P2:P3</code> will be a string concatenated copy of <code>Golf:Player:Scottish</code> - is this the case?</p>
  
  <pre><code>_gaq.push(['_setCustomVar',
  3,                          
  ‘P1',                       
  ‘Golf’,       
  3                        
  ]);
  
  _gaq.push(['_setCustomVar',
  4,                          
  ‘P2',                       
  ‘Player’,       
  3                        
  ]);
  
  _gaq.push(['_setCustomVar',
  5,                          
  ‘P3',                       
  ‘Scottish’,       
  3                        
  ]);
  
  _gaq.push(
  ['_setAccount', 'UA-123456-1'],
  ['_setCustomVar', 1, 'Category', 'P1:P2:P3']
  );
  </code></pre>