average of non-contiguous range based on criteria

[gtslabs]

I have a summary page with data in rows. Within that row I want the
average of all the numbers that have a specific value in the cell
before it.
For instance:
3 3500 3 3500 7 4000 7 4000 28 5000 28
I want the average of all the numbers with 7 before it or 4000. I
have 10 sets of data to shearch from.

Do I need a vba program to do this?

 

[Peo Sjoblom]

Maybe something like this


=SUMPRODUCT(--(A1:K1=7),B1:L1)/COUNTIF(A1:L1,7)

will work for you example



--


Regards,


Peo Sjoblom

 

[gtslabs]

Worked Great! - Thank you,
Could you please expalin the use of the -- ?
I have never seen this before.

 

[David Biddulph]

Please remember to quote enough of the message to which you are replying to
make the context of your question clear.

I you are talking about the use of the double unary minus, such as in a
SUMPRODUCT formula, try:
http://www.mcgimpsey.com/excel/formulae/doubleneg.html or
http://xldynamic.com/source/xld.SUMPRODUCT.html#format