Calculations

[J. McGonigal]

I am attempting to create a function to do the following.

I have to columns of data that I need to go through. I am attempting to
talley the number of occurences of each item.

To do this I need to go through column 'a' and every time it is 1, i then
must check column 'b'. If in column b the numbers 1,3,5,6 are found then I
need to add one to the talley. Can anyone suggest a way to do this. I
attempted to use countif formula but could not get something on it to work.

 

[Biff]

Hi!

Try this:

=SUMPRODUCT(--(A1:A20=1),--(ISNUMBER(MATCH(B1:B20,{1,3,5,6},0))))

Biff

 

[Fred Smith]

The other option is to create a Pivot Table. Once you understand them, they are
very slick and very powerful. There are several sites, including
www.cpearson.com which explain Pivot Tables.

 

[J. McGonigal]

Thanks, this worked wonderfully! Would mine explaining what the "--" do?

 

[J. McGonigal]

Thanks, I will begin to look at this in the near future.