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How would you count (& denote) consecutive values in a column?

  1. 11-23-2013, 04:06 PM #1
    schill2
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    How would you count (& denote) consecutive values in a column?

    Hi all,

    Please, kindly open the file attachment and see if you can do this -
    I have a column of +1 and -1 values (in A:A). I want the opposite column (B:B) to reproduce the value in the A:A column if only in the previous 2 cells, there have been 2 consecutive -1 values from A.

    If you could also write the formula to show how many instances of "2 consecutive -1 values" are in A:A, I would be so grateful.

    Thank you for your time
    NOTE :
    Sometimes, there are times when there have are more than two -1 values in the previous. I want to ONLY reproduce vales when there have been 2 consecutive -1 values NOT >2. What can I do?
    Attached Files Attached Files
    Last edited by schill2; 11-23-2013 at 05:02 PM.
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  2. 11-23-2013, 04:12 PM #2
    FDibbins
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    Re: How would you count (& denote) consecutive values in a column?

    Maybe this in B3, copied down?
    =IF(AND(A2<0,A1<0),A3,"")

    and then...
    =COUNT(B3:B600)
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  3. 11-23-2013, 04:28 PM #3
    RobertMika
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    Re: How would you count (& denote) consecutive values in a column?

    For -1 and 2 consecutive
    =SUM(IF(FREQUENCY(IF(A1:A100=-1,ROW(A1:A100)),IF(A1:A100<>-1,ROW(A1:A100)))=2,1))
    For 2 and more
    =SUM(IF(FREQUENCY(IF(A1:A100=-1,ROW(A1:A100)),IF(A1:A100<>-1,ROW(A1:A100)))=>2,1))
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  4. 11-23-2013, 05:00 PM #4
    schill2
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    Re: How would you count (& denote) consecutive values in a column?

    [QUOTE=FDibbins;3486924]Maybe this in B3, copied down?
    =IF(AND(A2<0,A1<0),A3,"")

    Sometimes, there are times when there have are more than two -1 values in the previous. I want to ONLY reproduce vales when there have been 2 consecutive -1 values NOT >2. What can I do?
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  5. 11-23-2013, 05:00 PM #5
    schill2
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    Re: How would you count (& denote) consecutive values in a column?

    Hi Robert, can you also answer my first question?
    Last edited by schill2; 11-23-2013 at 05:03 PM.
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  6. 11-23-2013, 05:04 PM #6
    RobertMika
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    Re: How would you count (& denote) consecutive values in a column?

    Check the file
    Copy of consec2.xlsx
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  7. 11-23-2013, 05:06 PM #7
    schill2
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    Re: How would you count (& denote) consecutive values in a column?

    Thanks Robert, what about the first question? (See FDibbins's answer and my reply)
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  8. 11-23-2013, 05:08 PM #8
    RobertMika
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    Re: How would you count (& denote) consecutive values in a column?

    Do you need to retrieve all -1?
    Or all -1 where the consec. is 2?
    So let say if the answer is 4 you got 8 -1?
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  9. 11-23-2013, 05:54 PM #9
    schill2
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    Re: How would you count (& denote) consecutive values in a column?

    Say we had this in A:A:
    1
    -1 (this value does not gets reproduced into B:B because there have not been 2 consecutive -1 values)
    -1 (this value does not gets reproduced into B:B because there have not been 2 consecutive -1 values)
    -1 (this value gets reproduced because into B:B there have been 2 consecutive -1 values)
    1 (this value does not gets reproduced into B:B because there have been 3 consecutive -1 values instead of 2)

    that is what i am trying to do with excel
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  10. 11-24-2013, 12:16 PM #10
    newdoverman
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    Re: How would you count (& denote) consecutive values in a column?

    I think that this might work for you

    Part 1 - Enter in B3 and copy down the length of your data.

    Formula: copy to clipboard 
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    Part 2

    Formula: copy to clipboard 
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