CODEWITHSUNDEEP
matlabmatrix
user3421541
user3421541

Reputation: 3

Multiplying complex matrices

I'm trying to multiply two complex matrices (b+c*i), but I'm getting no results.

??? Error using ==> mtimes
Inner matrix dimensions must agree.

Error in ==> impedancaZ at 14
l=mtimes(R1,h)

I don't understand this error, as matrix dimension are the same (2 coluoms and 9 rows)

Can you help me?

Upvotes: 0

Views: 452

Answers (1)

Bob Gilmore
Bob Gilmore

Reputation: 13768

Inner matrix dimensions must agree means that the inner dimensions of the matrices must match. If the first matrix has dimensions 2x9, then the second would need to be 9x(something). that's just basic liner algebra/matrix multiplication. In that case, you'll need to figure out what the second array should be. Maybe it's the transpose of what you expect it to be; instead of x*y, you might want x*y' (see the "prime" marker after the y?

Alternatively, maybe you want a "scalar multiply" rather than a "matrix multiply" for this. That is, you don't want to multiply the matrices x and y in the "linear algebra" sense, but you just want to multiply the elements of the arrays, element by element. In that case, you'd do x.*y (see the dot before the *?).

Unfortunately, I can't tell which is really correct for your situation without more context. You'll either have to supply some more information or figure it out yourself from the hints I've given.

Upvotes: 1

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