Question

I have 4 columns of codes, and another table that basically says that “group” the code falls into. Like so:

c1 c2 c3 c4
1  0  2  3
2  3  4  5 
3  4  2  0

The second table is

code group
1 a
2 a
3 a
4 b
5 b

I want to add a column next to C4 that will sum or count all of the values that are part of Group a. I tried doing

{=sum(if(vlookup({1,0,2,3},code:group,2,false)="a",1,0))}

but it doesn’t work (the 1,0,2,3 is just to simulate selecting the first row of data from table 1).

Any ideas how I can do it?

Answer 1

Assuming you have two named ranges Code and Group try this array* formula in the first row and fill down:

=SUM(--(IFERROR(LOOKUP(A1:D1,Code,Group)="a",0)))

*Commit the formula by pressing Ctrl+Shift+Enter