Count Unique Numbers

[Guest]

I have a list of number with many duplicates. I need to know how many unique
numbers are in that list. For example if the list was 2,2,2,3,4,5,5,5,6 I
would like to know that there are 5 unique numbers in the list.

This spreadsheet will be updated by people who are not familiar with Excel,
so I would like this to be as automated as possible.

Thanks

 

[Guest]

See here: http://www.cpearson.com/excel/duplicat.htm, specifically, the
section Counting Unique Entries in a Range.

Have a macro attached to a button which carries out the calculation, if you
want to automate this.

Dave

 

[vezerid]

=SUMPRODUCT(1/COUNTIF(A2:A10,A2:A10))

HTH
Kostis Vezerides

 

[Bob Phillips]

=SUMPRODUCT((A2:A200<>"")/COUNTIF(A2:A200,A2:A200&""))



--
---
HTH

Bob

(there's no email, no snail mail, but somewhere should be gmail in my addy)

 

[Guest]

=SUMPRODUCT((A1:A100<>"")/COUNTIF(A1:A100,A1:A100&""))

If all the numbers are in a cell then do this:
Data > Text to Column > Next > select Comma
then use formula above and adjust your range

 

[T. Valko]

Here's another one:

=SUM(--(FREQUENCY(A2:A10,A2:A10)>0))

Biff

 

[Harlan Grove]

Here's another one:

=SUM(--(FREQUENCY(A2:A10,A2:A10)>0))

....

Or just

=COUNT(1/FREQUENCY(A2:A10,A2:A10))