Hi @zizoo
I saw this discussion, and itś quite a challenge. I managed to create a wf min max diagonaal.knwf (418.3 KB) that compute the min/max values above and below the diagonal.
It’s starts with a loop that creates a diagonal (because a 0 is not always an indication of the diagonal). Then via Column Combiner and Splitter it is possible to extract the min and max values on both sides of the diagonal.
gr. Hans