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On a large scale, what is the most efficient way to multiply 2 columns together given a criteria (A1)
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On a large scale, what is the most efficient way to multiply 2 columns together given a criteria (A1)
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TechRetard.ToString();
There are always multiple ways to do something, when it doubt, drink a beer.
I do not care if you rep or not but please mark post as Solved if there is resolution so I stop going back and checking if anything else is needed.
I would guess the first, but most efficient would be to add a column that multiplies B2:B10 by C2:C10, then use SUMIF
e.g =SUMIF(A2:A10,A1,D2:D10)
where D2:D10 contains the =B2*C2 formula copied down
Where there is a will there are many ways.
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=SUMPRODUCT(--(A2:A10=A1), B2:B10,C2:C10)
or
=SUMPRODUCT((A2:A10=A1)*(B2:B10)*(C2:C10))
"Unless otherwise stated all my comments are directed at OP"
Mojito connoisseur and now happily retired
where does code go ?
look here
how to insert code
how to enter array formula
why use -- in sumproduct
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wiki Mojito
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Martin Wilson: SPV
and RSMBC
If you're interested there is calculation timer code at this link. Then you can run some tests and see for yourself which version is more efficient.
http://msdn2.microsoft.com/en-us/library/aa730921.aspx
Biff
Microsoft MVP Excel
Keep It Simple Stupid
Let's Go Pens. We Want The Cup.
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