title: r change structure of data frame
body: <pre><code>1 abc acb bca 2 abc acb bca 3 abc acb bca
  1 0.1 0.0 0.3 2 0.4 0.3 0.2 3 0.2 0.1 0.3
  1 0.3 0.2 0.1 2 0.4 0.2 0.1 3 0.1 0.3 0.4
  </code></pre>
  
  <p>I have a data frame like the example above. The same column names are occuring for 100 times. The data frame should look like this:</p>
  
  <pre><code>number abc acb bca
  1      0.1 0.0 0.3
  1      0.3 0.2 0.1
  2      0.4 0.3 0.2
  2      0.4 0.2 0.1
  ...
  </code></pre>
  
  <p>Is it possible to change the structure of the data frame?</p>