title: How to overlay density plots in R?
body: <p>I would like to overlay 2 density plots on the same device with R. How can I do that? I searched the web but I didn't find any obvious solution.</p>
  <p>My idea would be to read data from a text file (columns) and then use</p>
  <pre><code>plot(density(MyData$Column1))
  plot(density(MyData$Column2), add=T)
  </code></pre>
  <p>Or something in this spirit.</p>