Arrayformula sum one column until this row
问题 I'm trying to make an array formula which sums up all the rows until this row. For clarification column a will be the input and column b would be the output. I'm looking for a way to do this with an arrayformula. a1:1 b1:1 a2:2 b2:3 a3:5 b3:8 a4:3 b4:11 I tried to use =ARRAYFORMULA(SUM(INDIRECT("F1:"&ADDRESS(ROW(),COLUMN(F2:F))))) but this doesn't work. 回答1: Since OP changed the question with a clarification, A different answer is submitted below: B1: =ARRAYFORMULA(MMULT(transpose(A1:A5)*--IF