title: Rotating y axis labels with mosaic plots
body: <p>I am in an intro R class and was wondering how to rotate axis labels on the y axis with mosaic plots (vcd package). They are long labels and right now are completely overlapping each other. I would like to make them perpendicular to the rest of the plot (horizontal rather than vertical).
  I have tried the the ggplot lingo I am familiar with, las=, and str=, but nothing seems to have an effect. </p>
  
  <p>Here's my existing code:</p>
  
  <pre><code>```{R}
  # mosaic plot
  library(vcd)
  mosaic(~ USfuture + Education, data = OOL.sub, shade=TRUE, legend=TRUE, direction = "v")
  ```
  </code></pre>
  
  <p>Thank you!</p>