title: knitr plot not showing - basic example
body: <p>I am trying out Knitr with RStudio. The output of plot() is now showing up in the compiled PDF. </p>
  
  <p>Below is an example. The code shows up in the PDF, but not the plot. </p>
  
  <pre><code>\documentclass[11pt]{article}
  
  
  \begin{document}
  \SweaveOpts{concordance=TRUE}
  
  
  &lt;&lt;my-label, eval=TRUE&gt;&gt;=
  plot(1:20)
  @
  
  
  \end{document}
  </code></pre>
  
  <p>I'm not sure what I'm missing here? </p>