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counting unique values in col A against unique value in column B

  1. #1
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    counting unique values in col A against unique value in column B

    Hi,

    I came across this thread searching for an answer to my problem:

    http://www.excelforum.com/excel-gene...ue-values.html

    It suggests the following formula if data is in A2:C8, and input criteria are in E2 and F2
    =COUNT(1/FREQUENCY(IF($A$2:$A$8=E2,IF($B$2:$B$8=F2,IF($C$2:$C$8<>"",MATCH($C$2:$C$8,$C$2:$C$8,0)))),ROW($C$2:$C$8)-ROW($C$2)+1))

    This will not work for me as, while I could put a fixed dept value in F2, E2 in my example is not a fixed value. It is a person's name and is constantly changing. Basically, I have the following data (simplified greatly. There are other columns causing these duplicates e.g. details of role type):

    A (name)- B (dept)
    Mary - Sales
    Mary - Service
    Mary - Service
    John - Sales
    John - Sales
    Peter - Sales
    Peter - Service

    I need a formula that can populate a single cell counting the number of unique people in each dept (ignoring duplicate such as Mary appearing twice under Service). eg.
    Sales = 3
    Service = 2

    Can anyone suggest a way to do this? Thanks in advance

  2. #2
    Forum Guru Tony Valko's Avatar
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    Re: counting unique values in col A against unique value in column B

    Try this...

    With your data in the range A2:B8...

    D2 = Sales
    D3 = Service

    Enter this array formula** in E2 and copy down:

    =SUM(IF(FREQUENCY(IF(B$2:B$8=D2,MATCH(A$2:A$8,A$2:A$8,0)),ROW(A$2:A$8)-ROW(A$2)+1),1))

    ** array formulas need to be entered using the key
    combination of CTRL,SHIFT,ENTER (not just ENTER).
    Hold down both the CTRL key and the SHIFT key
    then hit ENTER.
    Biff
    Microsoft MVP Excel
    Keep It Simple Stupid

    Let's Go Pens. We Want The Cup.

  3. #3
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    Re: counting unique values in col A against unique value in column B

    Perfect! Thanks so much!

  4. #4
    Forum Guru Tony Valko's Avatar
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    Re: counting unique values in col A against unique value in column B

    You're welcome!

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