CVX error: Matrix dimensions must agree

1

Hello, I’m working on a MATLAB project involving optimization using CVX for matrix operations.

I am trying to perform element-wise multiplication between subsets of two arrays t and q, which are dynamically indexed by another array other_indices. The error occurs at:

for k=1:K
other_indices = setdiff(1:K, k);
EH(k) = eta * h(k) * sum(t(other_indices) .* q(other_indices)) + …
eta * sum(t(other_indices).* p(other_indices) .* g(k, other_indices));
end

Both t and q are 1x5 double arrays. other_indices is calculated in a loop, excluding the current loop index k. It seems to produce a valid subset of indices, yet the multiplication throws a dimension mismatch error.

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How could I solve this issue

2

I don’t know the sizes of t,q,p,g so i can 't determine what’s wrong.

Look at

size(t(other_indices))
size(q(other_indices))
size(p(other_indices))
size(g(other_indices))

I suspect you can resolve your difficulty using reshape and/or repmat.

Note that leading or intermediate dimensions of 1 matter, and are not the same as variables which don’t have those dimensions of 1 (other than final dimension).