title: How to prevent a plot cut off
body: <p>I would like to extend the (right) margin of my plot:</p>
  
  <p><a href="https://i.stack.imgur.com/rECOJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rECOJ.png" alt="Cluster"></a></p>
  
  <p>I tried it with <code>par(omi=c(10,10,5,20))</code> (arbitrary values) but it doesn't work.</p>
  
  <pre><code>par(oma=c(10,10,5,20))
  ggplot(df, aes(Cluster, Number_of_observations)) + 
    geom_bar(position = 'dodge', stat='identity', colour="Darkblue", fill = "skyblue") +
    geom_text(aes(label=Number_of_observations), position=position_dodge(width=0.9), 
              hjust = -0.25, vjust=-0.25) +
    coord_flip() +
    theme_bw()
  </code></pre>