Display a 1 for the first of duplicates

[Guest]

I have a list of records that have many duplicates. I need a formula that I
can use in the adjacent column to show a 1 for the first instance of a
duplicate and a 0 for any others. The list is sorted so all dupes are
together.

 

[Guest]

Try this formula:
=--(MATCH(A2,A:A,0)=ROW(A2))
and drag it down as required!

Regards,
Stefi


„noelle†ezt írta:

 

[Guest]

Use this formula in cell B3:

=IF(COUNTIF(C$3:C3, C3)=2, 1, 0)
Let me know if it works.

 

[Guest]

Note that the first solution above will flag the first occurence of each
value (duplicate or otherwise); the second solution will flag the second
occurence (=the first duplicate, literally). Choose the one that actually
matches your need.

 

[Guest]

Great, thanks. That worked!

Would you mind explaining the components so I understand how it works? It's
really been bugging me that I can't figure this out!

Thanks again.