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how do I sum all elements of an array?

DJV
1-Newbie
1-Newbie

how do I sum all elements of an array?

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

6 REPLIES 6
terryhendicott
20-Turquoise
(To:DJV)

Hi,

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

 

Capture.JPG

Cheers Terry

Hi,

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

Capture.JPG

Werner_E
24-Ruby V
(To:DJV)

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

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

 

summation.PNG

Alan

LucMeekes
23-Emerald II
(To:DJV)

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

Werner_E
24-Ruby V
(To:DJV)

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.

 

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