How would I track a rolling set of 30 cells?
I am trying to have a cell show me a sum for the past 30 days, updated daily.
The group of the 30 cells I'm summing will need to adjust down one cell daily. |
How would I track a rolling set of 30 cells?
One way:
Assume headings in row 1, then data in rows 2:xx, one row per day, date in column A, numeric data in column B: =SUM(OFFSET(B2,MAX(0, COUNTA(B:B)-31), 0, 30,1)) In article , CJ Barnes <CJ wrote: I am trying to have a cell show me a sum for the past 30 days, updated daily. The group of the 30 cells I'm summing will need to adjust down one cell daily. |
How would I track a rolling set of 30 cells?
Hi CJ
Another way assuming your data is in A1 to A30 then in B30 =IF(A30="","",SUM(A1:A30)) and drag it down as far as you need. The cell references will update as you drag drown. i.e. B31 will show =IF(A31="","",SUM(A2:A31)) etc. The B column will stay blank until you put a value into A HTH Martin |
How would I track a rolling set of 30 cells?
=SUMPRODUCT(--(A2:A100=TODAY()-30),B2:B100)
"CJ Barnes" wrote: I am trying to have a cell show me a sum for the past 30 days, updated daily. The group of the 30 cells I'm summing will need to adjust down one cell daily. |
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