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I am trying to implement this function so that it returns the sum of all the values in the m-by-n matrix A without using the buit in function sum

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function s = totalsum(A)
%A is an m-by-n matrix
%s is the sum of all the values in A
I dont know where to start.

Accepted Answer

Walter Roberson
Walter Roberson on 8 Oct 2013
t = cumsum(A(:));
s = t(end);

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