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summing arrays..

  1. #1
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    summing arrays..

    Heya! Again problem with arrays This question is rather theoretical, and, please, dont solve it other way - what is interesting is that exact point

    When i try to sum an array which is the result of either index or if functions then excel just ignore sum function. so 2 question:

    1. Why?
    2. How to overcome this without changing all these index and if functions.

    The example of the problem is in the attachment. Thanks and regards in advance.
    Attached Files Attached Files

  2. #2
    Forum Guru tigeravatar's Avatar
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    Re: summing arrays..

    Not really a need for an array formula, but since you specifically requested using an array formula, this will work:

    =SUM(IF(A1:D1="d",A3:D3))

    The reason the other one isn't, is because is only returning the number from a specific column, and no other numbers. You need to eliminate that condition.
    Hope that helps,
    ~tigeravatar

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    Administrator JBeaucaire's Avatar
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    Re: summing arrays..

    Because the structure is incorrect for that. Ultimately you have backended you way into a SUM(IF) situation, for which there is a specific correct syntax, and you're not using it. Just growing a monster formula forever like that isn't all that theoretically useful, my conclusion.

    The array format for your scenario is pretty simple:

    =SUM(IF($A$1:$D$1="d", $A$3:$D$3)) (entered as an array)


    And of course, Excel already has a non-array SUMIF function for this very purpose:

    =SUMIF($A$1:$D$1, "d", $A$3:$D$3)


    And there is even a SUMIFS() function if you need more than one criteria.
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  4. #4
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    Re: summing arrays..

    You're two guys just brilliant. I mean, simplicity is what rules and is really beautiful, and i need, probably, to reset my mind. Thank you for the lesson!

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