title: how to remove all rows in the CSV file which a value is greater than another?
body: <p>I have a csv file, 300 lines:</p>
  
  <p><code>ID,HEIGHT,MEAN WEIGHT,20-Nov-2002,05-Mar-2003,09-Apr-2003,23-Jul-2003
  1,1.80,80,78,78,82,82
  2,1.60,58,56,60,60,56
  3,1.90,100,98,102,98,102</code></p>
  
  <p>I want a file to delete all lines where the column MEAN WEIGHT> 75 and obtain another new file</p>
  
  <p><code>ID,HEIGHT,MEAN WEIGHT,20-Nov-2002,05-Mar-2003,09-Apr-2003,23-Jul-2003
  1,1.80,80,78,78,82,82
  3,1.90,100,98,102,98,102</code></p>