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Summin elements on the rows of a specific page of a matrix

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kevin cecere palazzo
kevin cecere palazzo on 30 Jul 2019
Answered: Guillaume on 30 Jul 2019
If I have a matrix A(n,m,2) i.e. a two pages matrix, and a vector B(n,1), how should I write the expression for the j-th element of b, if I want B to contain the sum of the elements of the rows of the first page of A?

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Guillaume
Guillaume on 30 Jul 2019
B = sum(A(:, :, 1), 2); %sum 1st page of A across the columns (across the 2nd dimension)

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