title: create a boxplot in R that labels a box with the sample size (N)
body: <p>Is there a way to create a boxplot in R that will display with the box (somewhere) an "N=(sample size)"?  The varwidth logical adjusts the width of the box on the basis of sample size, but that doesn't allow comparisons between different plots.</p>
  
  <p>FWIW, I am using the boxplot command in the following fashion, where 'f1' is a factor:</p>
  
  <pre><code>boxplot(xvar ~ f1, data=frame, xlab="input values", horizontal=TRUE)
  </code></pre>