title: How do I make a list of data frames?
body: <p>How do I make a list of data frames and how do I access each of those data frames from the list?</p>
  
  <p>For example, how can I put these data frames in a list ?</p>
  
  <pre><code>d1 &lt;- data.frame(y1 = c(1, 2, 3),
                   y2 = c(4, 5, 6))
  d2 &lt;- data.frame(y1 = c(3, 2, 1),
                   y2 = c(6, 5, 4))
  </code></pre>