title: Combining paste() and expression() functions in plot labels
body: <p>Consider this simple example: </p>
  
  <pre><code>labNames &lt;- c('xLab','yLabl')
  plot(c(1:10),xlab=expression(paste(labName[1], x^2)),ylab=expression(paste(labName[2], y^2)))
  </code></pre>
  
  <p>What I want is for the character entry defined by the variable 'labName,
   'xLab' or 'yLab' to appear next to the X^2 or y^2 defined by the expression(). As it is, the actual text 'labName' with a subscript is joined to the superscripted expression. </p>
  
  <p>Any thoughts?</p>