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Sum over a dimension

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Mike Nguyen
Mike Nguyen 2017-12-18
回答： Roger Stafford 2017-12-18
Suppose I have a V-by-K A matrix, a K-by-K B matrix, and K-by-N C matrix. How should I sum over k from 1 to K specified summation(k=1..K)of product (A_vk*B_kk*C_kn).

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Roger Stafford
Roger Stafford 2017-12-18
Bd = diag(B);
D = zeros(V,N);
for iv = 1:V
for in = 1:N
D(iv,in) = sum((A(iv,1:K).').*Bd(1:K).*C(1:K,in));
end
end

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