title: How do I change the stacking order in a bar chart in ggplot2?
body: <p>From the <a href="http://docs.ggplot2.org/0.9.2.1/geom_bar.html" rel="nofollow noreferrer">online bar chart guide</a>:</p>
  
  <pre><code>qplot(factor(cyl), data=mtcars, geom="bar", fill=factor(gear)) 
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/T9H6N.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/T9H6N.png" alt="barplot using &lt;code&gt;qplot&lt;/code&gt; feature of &lt;code&gt;ggplot2&lt;/code&gt;"></a></p>
  
  <p>How do I get 5 to sit on the bottom, 4 above that, and 3 on top?</p>