Skip to main content
D
DJV3-Newcomer
3-Newcomer
December 31, 2018
Question

how do I sum all elements of an array?

  • December 31, 2018
  • 5 replies
  • 17783 views

I need to sum all elements of an array.  Is there a function that does this?

5 replies

T
21-Topaz II
terryhendicott21-Topaz II
21-Topaz II
January 2, 2019

Hi,

Yes there is a function.  It is on the ribbon at Maths | Operators And Symbols | Operators | Calculus.

 

Capture.JPG

Cheers Terry

    T
    21-Topaz II
    terryhendicott21-Topaz II
    21-Topaz II
    January 3, 2019

    Hi,

    This for an "array" rather than just a "vector"

    Capture.JPG

    W
    Werner_E25-Diamond I
    25-Diamond I
    January 3, 2019

    The summation symbol Terry pointed you to only works with column and row vectors (matrices with either just one column or just one row).

    In case you are looking for the sum of all elements of an arbitrary matrix, here are two shorter routines which do the job:

    B1.png

    And here is a way to sum up recursively all scalars even in multiple nested matrices (for whatever that may be worth).

    B2.png

    Worksheet in format P5 attached

      A
      AlanStevens19-Tanzanite
      19-Tanzanite
      January 3, 2019

      You could also do the following for matrices (though not nested matrices):

       

      summation.PNG

      Alan

        L
        LucMeekes23-Emerald IV
        23-Emerald IV
        January 3, 2019

        Or, to be independent of ORIGIN and of the size of the array/Matrix:

        LM_20190103_ArraySum.png

        Success!
        Luc

        Prime 3.1 file attached

        W
        Werner_E25-Diamond I
        25-Diamond I
        January 4, 2019

        OK, here sure are many ways to skin a cat.

         

        Even though DJV doesn't show any interest, here are two more ways to achieve the desired result.

        B1.png

         

        Personally I still would prefer my first one, "SumAll1". It also seems to be the fastest, followed by the recursive "SumAll3".

        B2.png

        Worksheet in Format P5 attached.

         

          Terms & ConditionsCookie settingsAccessibility statement