计算过去 12 个月和 6 个月的平均值

Question

The excel user will export the data from an online website to excel (12 months data), so the data will be all the time different.

I need the past 6 months and 12 months average ( However, the calculation need to use the months I have in the data, and sometimes there will be less then 6 or 12 months ), but I still need to get the average and frequency for it, however, I am not sure how to get it.

I am trying to write a code, but it is not complete and is not working as well, I don't get an error; it just doesn't work.

I am open for Excel formulas as well, the problem may be the last row and that it need to use the data I have to calculate and not 6 and 12 months full.

PS: I post a similar question on https://www.ozgrid.com/forum/index.php?thread/1227312-dynamic-way-to-calculate-the-last-6-months-average/

Answer 1

Will This formulas work for you? Average for last 6 months:

=AVERAGEIF(A:A;">="&EDATE(MAX(A:A);-6);B:B)

Frequency for last 6 months:

=IF(MONTH(MAX(A:A)-MIN(A:A))>=6;COUNTIF(A:A;">="&EDATE(MAX(A:A);-6))/6;COUNTIF(A:A;">="&MIN(A:A))/MONTH(MAX(A:A)-MIN(A:A)))

Average for last 12 months:

=AVERAGEIF(A:A;">="&EDATE(MAX(A:A);-12);B:B)

Frequency for last 12 months:

=IF(MONTH(MAX(A:A)-MIN(A:A))>=12;COUNTIF(A:A;">="&EDATE(MAX(A:A);-12))/12;COUNTIF(A:A;">="&MIN(A:A))/MONTH(MAX(A:A)-MIN(A:A)))