G
Guest
I am using the following formula to calculate an average of data for a
rolling 365 day period. Column A is the date, column B is Data
=((SUMPRODUCT(--($A$1:$A3<$A3),--($A$1:$A3>=$A3-365),($B$1:$B3))))/(SUMPRODUCT(--($A$1:$A3<$A3)*--($A$1:$A3>=$A3-365)))
Is there a simpler way to accomplish this?
How can I calculate the standard deviation for the same period?
rolling 365 day period. Column A is the date, column B is Data
=((SUMPRODUCT(--($A$1:$A3<$A3),--($A$1:$A3>=$A3-365),($B$1:$B3))))/(SUMPRODUCT(--($A$1:$A3<$A3)*--($A$1:$A3>=$A3-365)))
Is there a simpler way to accomplish this?
How can I calculate the standard deviation for the same period?