title: Extract a row from a table object
body: <p>I want to know how to get a specific row from a table in R. For example,</p>
  
  <pre><code>&gt; a &lt;- c(13,13, 
      14,14,14,14,14,14,
      15,15,15,15,15,15,
      16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
      17,17,17,17,17,17,17,
      18,18,18,18,18,18,18,18,18,18,18,18,18,18,18,18,18,
      19,19,19,19,19,19,19,19,19,19,19,
      20,20,20,20,20,20,20,20,20,
      21,21,21,21,21,21,21,21,21,21,21,
      22,22,22,22,22,22,22,22,22,
      23,23,23,24,25,25,27)
  &gt; table(a)
  a
  13 14 15 16 17 18 19 20 21 22 23 24 25 27 
  2  6  6 15  7 17 11  9 11  9  3  1  2  1 
  </code></pre>
  
  <p>How do I extract the last row of the table?</p>