title: changing position of stacked histogram R
body: <p>I used the following code:</p>
  
  <pre><code>ggplot(adult, aes(age)) + geom_histogram(aes(fill= income), color= 'black', binwidth = 1) + theme_bw()
  </code></pre>
  
  <p>To generate this plot:</p>
  
  <p><a href="https://i.stack.imgur.com/TNB5A.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TNB5A.jpg" alt="enter image description here"></a></p>
  
  <p>My question is how do you change the stacked position for the plot to look like this:</p>
  
  <p><a href="https://i.stack.imgur.com/OtgK5.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OtgK5.jpg" alt="enter image description here"></a></p>