title: R boxplot long names out of the plot area
body: <p>My boxplot names are long and making it vertical chop these names.  How can I avoid the names/labels of boxplot going out of the plot area?   </p>
  
  <pre><code>dat &lt;- data.frame(values = rnorm(100), group = gl(2, 50))
  levels(dat$group) &lt;- c("reallyreallylonglabel", 
                         "anevenlooooooooooooongerlabel")
  boxplot(values ~ group, data = dat,  las = 3)
  </code></pre>