Excel/OFFSET

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Question
I have a question on an equation in a file that I inherited. I can't figure out why the equation is working in other cells, but does not seem to work in the next row down. I'm using Excel 2013.
=OFFSET(NSA!A1,MATCH(G2,NSA!B2:B111,0),COUNTA(NSA!1:1),1,1)-OFFSET(NSA!A1,MATCH(G2,NSA!B2:B111,0),COUNTA(NSA!1:1)-1,1,1)

Thank you!

Answer
Elizabeth,

Assume this formula

=OFFSET(NSA!A1,MATCH(G2,NSA!B2:B111,0),COUNTA(NSA!1:1),1,1)-OFFSET(NSA!A1,MATCH(G2,NSA!B2:B111,0),COUNTA(NSA!1:1)-1,1,1)

is the formula that works.  If you copy and paste it in the next cell down, it will appear as

=OFFSET(NSA!A2,MATCH(G3,NSA!B3:B112,0),COUNTA(NSA!2:2),1,1)-OFFSET(NSA!A2,MATCH(G3,NSA!B3:B112,0),COUNTA(NSA!2:2)-1,1,1)

so you see that all the row references would increase by 1.  

I would guess that that is not what you want and would be the reason it is not working.  You can fix references by using the $ Sign

=A1  when dragged down one row becomes  =A2
=$A$1  when dragged down one row becomes  =$A$1 - it doesn't change because the addition of the Dollar Sign ($) to the row and column reference makes them absolute and not relative.

I would guess this is your problem given the very limited information provided.

--
Regards,
Tom Ogilvy  
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Tom Ogilvy

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Selected as an Excel MVP by Microsoft since 1999. Answering Excel questions in Allexperts since its inception in 2001. Able to answer questions on almost all aspects of Excel's internal capabilities. If seeking a VBA solution, please specify that in your question itself so I give you the answer you want. [Excel has weak protection - if you are distributing an application, I don't answer questions on how to protect your project from your users.]

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