title: Combine data frames from a vector of names
body: <p>I have an issue that I thought easy to solve, but I did not manage to find a solution. 
  I have a large number of data frames that I want to bind by rows. To avoid listing the names of all data frames, I used "paste0" to quickly create a vector of names of the data frames. The problem is that I do not manage to make the rbind function identify the data frames from this vector of name.
  More explicitely:</p>
  
  <pre><code>df1 &lt;- data.frame(x1 = sample(1:5,5), x2 =  sample(1:5,5))
  df2 &lt;- data.frame(x1 = sample(1:5,5), x2 =  sample(1:5,5))
  idvec &lt;- noquote(c(paste0("df",c(1,2))))
  &gt; [1] df1 df2
  </code></pre>
  
  <p>What I would like to get:</p>
  
  <pre><code>dftot &lt;- rbind(df1,df2)
     x1 x2
  1   4  1
  2   5  2
  3   1  3
  4   3  4
  5   2  5
  6   5  3
  7   1  4
  8   2  2
  9   3  5
  10  4  1
  
  dftot &lt;- rbind(idvec)
  &gt;       [,1]  [,2] 
  &gt; idvec "df1" "df2"
  </code></pre>