google-sheets
How to calculate running average with 1 formula in Google Sheets?
How do you calculate running average with 1 formula in Google Sheets?
In the example below, Data column is given (and dynamically generated/appended); Average_so_far column is desired.
| row index | Column A [Data] | Column B [Average_so_far] |
|---|---|---|
| 1 | 1 | 1 |
| 2 | 1.5 | 1.25 |
| 3 | 2 | 1.5 |
| 4 | 1.5 | 1.5 |
| 5 | 1.25 | 1.45 |
How do you generate the values of running averages in 1 formula?
Solution
You may try MAP() or BYROW() function. Try-
=MAP(B2:B6,LAMBDA(x,AVERAGE(B2:INDEX(B2:B,ROW(x)-ROW(B1)))))
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