EXCEL：检查是否在另一列中找到单元格文本

Question

I have a set of 6500 school courses that I need to "normalize" and the process is to take the exact code (ex: 23.XX510XXX) if that number is contained in a set of defined "rigorous courses" or if it is AP. So the algorithm is like this:

if x is contained within X:
then x=x
else if PSO=0:
then x=23
else if (#Observed/PSO) >.5
then x=x
else x=23

But I'm not sure how to do this in excel. I tried this:

=IF(ISERROR(VLOOKUP(C2,$L$1:$L$28,0,FALSE)),23,IF(F2=0,23,IF(G2/F2>0.5,C2,23)))

But it only returns 23 every time. The way it is set up, is column C is the non-normalized number that I check against column L. Column F is the PSO indicator and column G is the #observed.

The PSO and #observed is because we are willing to accept the course overall as rigorous if it was taken as AP more than 50% of the time.

Does anyone see where I went wrong?

If anyone can explain how to do it in VBA (not just give me the code) I'd love you forever!!

Answer 1

That looks almost right but the VLOOKUP will always return an error because your "Column Index" is zero, where it should be 1 - try like this

=IF(ISERROR(VLOOKUP(C2,$L$1:$L$28,1,FALSE)),23,IF(F2=0,23,IF(G2/F2>0.5,C2,23)))

.....or my preference is for COUNTIF like this

=IF(COUNTIF($L$1:$L$28,C2)=0,23,IF(F2=0,23,IF(G2/F2>0.5,C2,23)))