title: Create new Dataframe that is filled with simple computation from another Dataframe
body: <p>I am looking to create a new DataFrame the rows/cells are filled in with a simple computation based on another DataFrame. Example below:</p>
  <p>Original DF:</p>
  <pre><code>Col1   Col2   Col3   Col4   Col5
   5      3      4       2     10
   3      2      1       4      2 
   2      9      7       0      4
  </code></pre>
  <p>Create new DF where the values in Col1-5 are being subtracted from Col5, thus desired DF being:</p>
  <p>Desired DF</p>
  <pre><code>Col1   Col2   Col3   Col4   Col5
   5      7      6       8      0
  -1      0      1      -2      0 
   2     -5     -3       4      0
  </code></pre>
  <p>Obviously just to get the answers, in my original value I could just create new columns where I subtract the two, but I have A LOT OF rows and thus would double the size of my DataFrame - so I'm looking to create a new one if possible.</p>