title: rbind in R gives a weird rowname
body: <p>I have the following dataframes <code>tt1</code> </p>
  
  <pre><code>&gt; tt1[2,]
          date  close emp pred
  2 1982-03-24 112.97  -1    1
  </code></pre>
  
  <p>and dataframe <code>tt2</code></p>
  
  <pre><code>&gt; tt2[2,]
          date  close emp pred
  2 1982-03-25 113.21   1    1
  </code></pre>
  
  <p>when I try to use <code>rbind()</code> I get weird row name for the 2nd row.</p>
  
  <pre><code>&gt; rbind(tt1[2,],tt2[2,])
           date  close emp pred
  2  1982-03-24 112.97  -1    1
  21 1982-03-25 113.21   1    1
  </code></pre>
  
  <p>any clue has to how to get rid of that have it as 1, 2</p>