CVX - mtimes error - multiplication of vectors

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Sree Prasanna Rajagopal
Is there a way to do vector multiplication in the cvx ( http://cvxr.com/cvx/) environment? Because there is a problem I need to solve and I'm not sure how a constraint can be framed without something so simple as a vector multiplication. I was using fmincon and there was no problem but now, when I use the same function, I get errors.
The operation I get error on is like this:
C = A*B
where A = column vector and B = row vector

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回答（1 个）

Roger Stafford
Roger Stafford 2013-6-12
If A is a column vector and B a row vector, you should get no error message on the operation
C = A*B
The result should be an array which has as many rows as elements in A and as many columns as elements in B. It contains every possible product between elements of A and B.
You WILL get an error if A is a row vector and B a column vector if they have different numbers of elements.
  2 个评论
Sree Prasanna Rajagopal
Sree Prasanna Rajagopal 2013-6-12
Yeah, I'm not talking about general matrix multiplication rules here. My question is specific to the CVX environment.
Roger Stafford
Roger Stafford 2013-6-12
You should not assume that people who answer questions here understand the workings of CVX. Certainly I don't. Please phrase your question in terms such that we can easily understand what you are asking without having to comprehend all the details of CVX.

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