title: How to loop the subtraction of the value in the first row to values in the same column
body: <p>I am looking for a function/loop that picks out first the first cell of subvalues to subtract the subvalue in the second cell, then on the 2nd loop picking out the 2nd cell, etc. Then loop to do so for every column</p>
  <p>For example:
  <a href="https://i.stack.imgur.com/4rdZ5.png" rel="nofollow noreferrer">Data Example</a></p>
  <p>G1 - G2, G1 - G3, G1- G4 etc. Then G2 - G3, G2 - G4 etc.</p>