Selecting a row in excel based on specific values in 2 columns,

Question

Data roughly in the format

A    B    C
ID1  ID2  0.5
ID1  ID3  0.7
ID2  ID3  0.9

I want to create a correlation matrix (column C being the

Answer 1

Assuming your source data range is on Sheet1, from A1 to C3 and your results range is on Sheet2, from A1 to D4.

You can put this formula on B2:

=SUMPRODUCT((Sheet1!$A$1:$A$3=Sheet2!B$1)*(Sheet1!$B$1:$B$3=Sheet2!$A2)*Sheet1!$C$1:$C$3)

and then, drag and drop this formula on the whole range.

Answer 2

Why don't you create a third column that combines the values from columns A and B using =A1&B1 and then do vlookup on that value:

A    B    C       D
ID1  ID2  ID1ID2  0.5
ID1  ID3  ID1ID3  0.7
ID2  ID3  ID2ID3  0.9