I've got basically three columns. ID, description, and numerical value
I would like to get an average of everything with identical ID an
Description, then put that average in the fourth column, but only o
the first instance of the ID and Description. The columns can be sorte
first if it's easier. I don't know how many of each there are.

example:

ID Description Value
Average
1 a 13
13
1 b 10
15
1 b 20
2 a 20
22
2 a 24
3 a 20
24
3 a 22
3 a 26
3 a 28
3 b 27
27


I've never written my own macro, and it's been forever since i eve
modified someone else's. Even just a headstart would be greatl
appreciated.

Ric

--
Message posted from http://www.ExcelForum.com

Hi
try the following array formula in cell D2 (entered with
CTRL+SHIFT+ENTER):
=IF(MATCH(1,($A$1:$A2=A2)*($B$1:B2=B2),0)=ROW(),AV ERAGE(IF
(($A$2:$A$100=A2)*($B$2:$B$100=B2),$C$2:$C$100)))

and copy this down

-----Original Message-----
I've got basically three columns. ID, description, and
numerical value.
I would like to get an average of everything with
identical ID and
Description, then put that average in the fourth column,
but only of
the first instance of the ID and Description. The columns
can be sorted
first if it's easier. I don't know how many of each there
are.

example:

ID Description
Value
Average
1 a
13
13
1 b
10
15
1 b 20
2 a
20
22
2 a 24
3 a
20
24
3 a 22
3 a 26
3 a 28
3 b
27
27


I've never written my own macro, and it's been forever
since i even
modified someone else's. Even just a headstart would be
greatly
appreciated.

Rich


---
Message posted from http://www.ExcelForum.com/

.