Counting ISNAs?

F

Faraz A. Qureshi

I want to check how many of the entries in A1:A10, are not found to be
existing in another list, suppose B1:B20.

Tried out:

=SUMPRODUCT(--(ISNA(VLOOKUP(A1:A10,B1:B20,1,0))))

but failed. What might be the reason? and what might be its solution except
then a helper column?
 
J

Jacob Skaria

Try the array formula

=SUM(IF(A1:A10<>"",IF(ISNA(MATCH(A1:A10,B1:B20,0)),1,0)))

If this post helps click Yes
 
F

Faraz A. Qureshi

Thanx Jacob!

Nice 2 find u after such a longtime! Was on an official leave actually. Sure
would oblige if u would also answer my question on the programming panel as
"Counting Errors".

Thanx in advance.
 
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