How to apply a column formula on only a range of rows and not every row?

[#1]

Hi,

I am trying to create a column formula that calculates the mean of every 5 rows (for a specific column). 

Normally the formula are applied to every row using values in such row. Instead, I would like to use values from 5 previous row to calculate a mean value.

I am been playing with the formula editor and try to use the Row() and other functions, but without success. 

Thanks a lot to anyone who can help me out.

BR

AC_AC

 

[#2 · Accepted solution]

For Mean I would suggest using Col Moving Average

If(Modulo(Row(), 3) == 0,
	Col Moving Average(:Col, 1, 2, 0),
	.
)

Otherwise Data table subscripting might be helpful

If(Modulo(Row(), 3) == 0,
	Mean(:Col[Index(Row() - 2, Row())])
)