title: insert variable value label for graph title
body: <p>I can't quite grasp how to insert a variable's value labels for titles to a graph. </p>
  
  <p>For example, in <code>sysuse auto</code>, the variable <code>foreign</code> takes the value of 0 or 1 where 0 is labeled "Domestic" and 1 is labeled "Foreign". </p>
  
  <p>In the following snippet, I want to plot the average price for each category of the variable <code>foreign</code> using a loop: </p>
  
  <pre><code>sysuse auto, clear
  forvalues i=0/1{
      local t = foreign[`i'] 
      graph bar (mean) price if foreign == `i', ///
          over(rep78, sort(price) descending) asyvars ///
          title("`t'") name(p_`i', replace) nodraw 
      local graphs `graphs' p_`i'
  }
  gr combine `graphs' 
  </code></pre>
  
  <p>but it does not even display the category value correctly in the title. </p>
  
  <p>What am I doing wrong? </p>