title: Change the scale of x axis in ggplot
body: <p>I have a ggplot bar and don't know how to change the scale of the x axis. At the moment it looks like on the image below. However I'd like to reorder the scale of the x axis so that 21% bar is higher than the 7% bar. How could I get the % to the axis? Thanks in advance!</p>
  
  <p><a href="https://i.stack.imgur.com/YILmJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YILmJ.png" alt="enter image description here"></a></p>
  
  <pre><code>df= data.frame("number" = c(7,21), "name" = c("x","y"))
  df
  ggplot(df, aes(x=name, y=number)) + 
    geom_bar(stat="identity", fill = "blue") + xlab("Title") + ylab("Title") + 
    ggtitle("Title") 
  </code></pre>