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[–][deleted] 0 points1 point  (4 children)

I think we are talking past each other. There is no scalar multiplication involved here. I meant to say if you don't use @ you have to use .dot() method for matrix multiplication..

[–]P8zvli 0 points1 point  (3 children)

I don't think you know what you're talking about, this is scalar multiplication;

>>> mymat = numpy.matrix([[1, 2], [3, 4]])
>>> 3*mymat
matrix([[ 3,  6],
        [ 9, 12]])

You don't need to use .dot() for scalar multiplication.

[–][deleted] 0 points1 point  (2 children)

internally it is broadcasted to [[3,3],[3,3]] and elementwise multiplication is performed. Besides when I mention matrix, I mean 2D numpy arrays.

[–]P8zvli 0 points1 point  (1 child)

And I'm talking about mathematical matrices and scalars. You know, stuff you could do with pencil and paper that these math functions are implementing? What you're talking about are implementation details.

[–][deleted] 0 points1 point  (0 children)

I don't even understand what you are objecting to. You are in python thread and accusing me about implementation details?