1 Reply Latest reply on Sep 5, 2012 2:40 PM by Tracy Rodgers

    How do I take the average of a difference

      I have calculated a 4-year difference however there are some schools without a difference.  Tableau is taking the average of year 4 minus the average of year 1.  However, I need the average difference of only those schools that have a difference.  How do I accomplish this?