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Re: Summing all the elements along a dimension in a matrix


Hi Patrick,

Many ways to do this, but the easiest way will be using Total. The
syntax variant you could use here is Total[A,{3}].

Perhaps you should check whether the ordering of the dimensions is the
same in both systems.

Cheers -- Sjoerd


On Oct 26, 6:26 am, CuppoJava <patrickli_2... at hotmail.com> wrote:
> Hi,
> I just started using Mathematica after a year of experience with
> another system, and I have a question regarding how to handle matrices.
>
> What is the equivalent code for doing
> sum(A,3) in mathematica?
> This sums all the elements A along the third dimension.
>
> I'm having a hard time finding it in the documentation.
>
> Thanks a lot for your help
>   -Patrick



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