title: How to delete columns in vi file?
body: <p>I have a vi file containing hundreds of lines with the following format</p>
  
  <pre><code>029.inp.log:  SCF  Done:   E(RHF)  =   -844.790844670      A.U.  after    26 cycles 
  </code></pre>
  
  <p>I want to delete all of the columns (separated by spaces/tabs. got messed up when I pasted it here) other than the first (029.inp.log:) and the fifth (-844.790844670). Can anyone help me? </p>