title: Picking individual colours from a RColorBrewer palette as a scale_colour_manual() value in ggplot2
body: <p>Using <code>scale_colour_manual()</code>, can one pick specific colours from RColorBrewer to use as colour values?</p>
  
  <p>For instance, in:</p>
  
  <pre><code>scale_colour_manual(breaks=c("A","B","C","D","E"), 
      values=c("green","orange","blue","pink","yellow")) 
  </code></pre>
  
  <p>I'd like to use the first colour from the palette <code>scale_colour_brewer(type = "qual", palette = 7)</code> instead of "green", then the fourth colour of the palette <code>scale_colour_brewer(type = "qual", palette = 2)</code> instead of "orange", and so on.</p>