title: Why rbind converts a list of numeric elements to a character matrix?
body: <p>Why does rbind convert my list of numeric elements to character?</p>
  
  <pre><code>&gt; class(mymatrix.list)
  [1] "list"
  &gt; class(mymatrix.list[[1]])
  [1] "numeric"
  &gt; mymatrix.results = do.call(rbind, mymatrix.list)
  &gt; class(mymatrix.results)
  [1] "matrix"
  &gt; class(mymatrix.results[1])
  [1] "character"
  </code></pre>