Cumulative Summation by Group
I am trying to do a Cumulative Summation by a group value in another column, and so far nothing I have tried (For, While, double Summation) has worked. I can do a cumulative sum for the entire table with:
Summation( ::i = 1, Row(), :Total WIP[::i, Empty()] )
However, I need to do a separate cumulative sum for each "segment" I have in another column (i.e. I need a cumulative sum where :seg==1, and ...