Question

i am trying to merge excel columns into one column like this…

List1   List2   List3   List4   List5
1       0       0       0       0
0       1       0       0       0
0       0       1       0       0
0       0       0       1       0
0       0       0       0       1

into this…

List
0
1
2
3
4

If there is a 1 in List1 the merged column will have value 0
if List2 is a 1 the merged column will have value 1
and so on…

Answer 1

If your data start in top-left corner, then for the cells in the result range you could write array formulas like

{=SUM(A2:E2*(COLUMN(A2:E2)-1))}

Another idea is to write a single array formula for the whole result range

{=MMULT(A2:E6,{0;1;2;3;4})}