title: Combine a list of data frames into one data frame by row
body: <p>I have code that at one place ends up with a list of data frames which I really want to convert to a single big data frame. </p>
  
  <p>I got some pointers from an <a href="https://stackoverflow.com/questions/1652522/rbind-dataframes-in-a-list-of-lists">earlier question</a> which was trying to do something similar but more complex. </p>
  
  <p>Here's an example of what I am starting with (this is grossly simplified for illustration):</p>
  
  <pre><code>listOfDataFrames &lt;- vector(mode = "list", length = 100)
  
  for (i in 1:100) {
      listOfDataFrames[[i]] &lt;- data.frame(a=sample(letters, 500, rep=T),
                               b=rnorm(500), c=rnorm(500))
  }
  </code></pre>
  
  <p>I am currently using this:</p>
  
  <pre><code>  df &lt;- do.call("rbind", listOfDataFrames)
  </code></pre>