How to recursively calculate mean of values based on values present in another cell of the same row in Excel

Question

I have a spreadsheet with two columns of values, containing 1000 values each. The first column (column A) contains these values:

W
W
W
T
T
T

The second column (column B) contains these values:

1
2
3
4
5
6

Here is an image of the spreadsheet:

Can you please tell me if there is a way to recursively calculate the mean of those values in column B that have the same value in column A? In my case, the output should be a new column that looks like this:

2
5

As you can see, "2" is the mean of values in column B that has "W" in column A, while "5" is the mean of values in column B that has "T" in column A.

Answer 1

可以使用SubTotals功能处理此类问题，使用Average()作为要使用的函数（而不是默认的Sum()函数）。