Hi, I was playing with cumulative sum of list and it works great. However with sublists (or more than one list) it’s not that easy - I can’t force it pair respective lists - see sketch . Any help will be appreciated. Regards Przemek [image]

Cumulative sum of sublists

Tomasz_Puchala March 22, 2017, 10:00am 3

One liner:

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How to roll forward and sum？