Petter

Array multiplication .* is already implemented.

John, the reason the * operator is included at all is because it is desirable to support operations like
a = int64(2);
b = int64( [1 2; 3 4] );
c = a * b

That is the reason * was included. The next update will issue an error if both a and b are matrices. Thank you for your suggestions.

Never mind, I misunderstood what you meant. Implementing a crude A*B is very easy, so I might do that.

I can't test this myself, so I cannot rate it. But if it now prevents A*B when A and B are both matrices, neither of which is a scalar, then this is good if it would otherwise have done the wrong thing. Better of course is to implement array multiplication too (perhaps in a future version.) Regardless, there have been a few times recently when I wanted to have int64 operations defined, so this is a good addition to MATLAB.

John -- Thanks for pointing out that Int64 matrix multiplication is element-wise. I should have been more careful, given that the description clearly states that "multiplication and division are element-wise only". This of course explains the O(n^2) behavior.

On a more general point, I wish there was a consistent standard for matrix multiplicaton. For example, in O-Matrix, C= A*B is the same as Matlab, but C=A^2 gives cij = (aij)^2. This is really confusing. In Fortran 90, C=A*B gives cij = aij*bij.