title: I cannot apply a ColorBrewer palette on a line chart in ggplot2
body: <pre><code>p1 &lt;- ggplot(data, aes(x, y, group=label))
  p2 &lt;- p1 + geom_line()+geom_point()
  library(RColorBrewer)
  p2 + scale_fill_brewer(palette="Oranges")
  </code></pre>
  
  <p>Sadly, I cannot post a image because of reputation limitation! The result is a line chart in with only black line and dots.</p>
  
  <p>If I add "color=label" in the aes() part, the result uses the default color scheme, not my intended colors.</p>
  
  <p>What should I do?</p>