title: Concatenate list of lists in R
body: <p>I have a list TF2Gene[1326] which looks like</p>
  
  <pre><code>view(TF2Gene)
  
  structure(list(Sp1=c("a","b","c"),p53=c("x","y","z"),Elk1=c("1","2","3"),...))
  </code></pre>
  
  <p>So its basically a list of 1326 lists.</p>
  
  <p>Now I want to concatenate the values of these lists in 1 so that I can find the unique members. What I am doing is:</p>
  
  <pre><code>cols &lt;- unique(unlist(TF2Gene))    
  </code></pre>
  
  <p>Is this correct?           </p>