title: Change width of bars in barchart (R)
body: <p>I am wondering how to change the width of the bars in the barchart() function. </p>
  
  <p>Here is the code:</p>
  
  <pre><code>rater1 &lt;- c(0.75, 0.66, 0.73,   0.63)
  barplot(rater1, ylim=c(0:1),axes = TRUE, names.arg = c("A", "B", "C", "D"), axisnames=TRUE, col="grey70")
  </code></pre>
  
  <p>Is it also possible to place value labels above the bars?</p>
  
  <p>Thanks.</p>