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Re: Sum of matrices


From: Ben Abbott
Subject: Re: Sum of matrices
Date: Sun, 15 Sep 2013 21:32:15 -0400

On Sep 15, 2013, at 6:04 PM, george brida wrote:

> Dear Octavers,
> Suppose we have 100 square matrices of order 50: A_1; A_2;...;A_100. We put 
> these matrices in the following manner: B=[A_1;A_2;...;A_50]
> how we can write a program performing the sum of these matrices from the 
> matrix B.
> Thank you

I'm not sure I understand the structure of B.  If the size of B is [(50*50) x 
50] then ...

        sum (reshape (B', [50, 50, 50]), 3)

If the size of B is [(100*50) x 50] then ...

        sum (reshape (B', [50, 50,100]), 3)

Ben



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