title: how to change the width of stat_boxplot (errorbar)
body: <p>I am using ggplot2 for box ploting.<br>
  However, I can't change the width of stat_boxplot (geom ='errorbar').<br>
  Here is part of my code:</p>
  
  <pre><code>geom_boxplot(width=0.5)+stat_boxplot(geom ='errorbar',width=0.5)
  </code></pre>
  
  <p>It's OK for <code>geom_boxplot()</code>, but the width of <code>stat_boxplot(geom ='errorbar')</code> is not changed .<br>
  Any suggestions? Thank you!</p>