title: Can you adjust the width of a single stacked bar chart with ggplot2?
body: <p>I would like to make the bar chart from the code below narrower.</p>
  
  <pre><code>df &lt;- data.frame(
        names = LETTERS[1:4],
        vals = c(25, 20, 30, 25))
  
  ggplot(df,aes(1,y=vals,fill=names)) +
    geom_bar(stat="identity")
  </code></pre>
  
  <p>I have tried to fix this using <code>width</code> in the ggplot command, but it seems that this only works if there are multiple bars. Thanks</p>