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Find SUM of diagonal entries in a range of values

  1. #1
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    Question Find SUM of diagonal entries in a range of values

    Hello,
    I am using Excel 2016.

    I want to sum all DIAGONAL entries

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    My current formula does not work for some reason.
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    I would think that this sums the entries from A1 to D4, if the column number is equal to the row number.
    Which should equal 4.

    I would greatly appreciate if anyone could let me know what is wrong with my formula
    and what is/are the correct ways) of doing this.

    Thank you!

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    Re: Find SUM of diagonal entries in a range of values

    Try array-entering this.

    =SUM(IF(ROW(1:4)=COLUMN(A:D),A1:D4))

    If you aren’t familiar with array-entered formulas array enter means the formula must be committed from edit mode by simultaneously pressing and holding down Ctrl and Shift while hitting Enter.



    A
    B
    C
    D
    E
    F
    G
    1
    1
    2
    3
    4
    4
    In F1 array-entered
    2
    2
    1
    3
    4
    =SUM(IF(ROW(1:4)=COLUMN(A:D),A1:D4))
    3
    3
    2
    1
    4
    4
    4
    2
    3
    1
    Dave

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    Re: Find SUM of diagonal entries in a range of values

    Thank you so much!

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    Re: Find SUM of diagonal entries in a range of values

    Mathfun,

    You are welcome. Thank you for the feedback and the rep.

    I failed to notice this thread was your first post. My apologies and welcome to the forum.

  5. #5
    Forum Guru Tony Valko's Avatar
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    Re: Find SUM of diagonal entries in a range of values

    Here's another one that's a bit more robust.

    Data Range
    C
    D
    E
    F
    5
    26
    0
    89
    68
    6
    95
    97
    91
    85
    7
    5
    92
    99
    24
    8
    16
    87
    35
    87
    9
    ------
    ------
    ------
    ------
    10
    11
    309


    This array formula**:

    =SUM(IF(ROW(C5:F8)-ROW(C5)=COLUMN(C5:F8)-COLUMN(C5),C5:F8))

    ** 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.

  6. #6
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    Re: Find SUM of diagonal entries in a range of values

    And for the other diagonal??

    16, 92, 91, 68

  7. #7
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    Re: Find SUM of diagonal entries in a range of values

    How about modify Tony's formula

    =SUM(IF((ROW(F8)-ROW(C5:F8))=COLUMN(C5:F8)-COLUMN(C5),C5:F8))

  8. #8
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    Re: Find SUM of diagonal entries in a range of values

    Yes, I managed myself. Thank you FlameRetired.

  9. #9
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    Re: Find SUM of diagonal entries in a range of values

    You are welcome. Thank you for letting us know.

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