[SYSTEMDS-2102] Vectorize gradients for Factorization Machines function

[j143]

[j143]

the code doesn't seem to be correct:

-- old g_V2 -- 0.000 0.000 0.000 -0.001 0.000 -0.000 0.000 -0.002 0.000 0.000 0.000 -0.001 0.000 -0.014

-- g_V2 -- 0.000 -0.017

[Baunsgaard]

LGTM

but remove the commented code.

[j143]

Hi @Baunsgaard - thanks for review.

I believe the vectorization I made is incorrect, especially output dimensions. I will keep this in draft for a while.

[Baunsgaard]

Hi @Baunsgaard - thanks for review.

I believe the vectorization I made is incorrect, especially output dimensions. I will keep this in draft for a while.

aww sad, it looked good at a surface glance, maybe we do not have enough tests ? or is it that the NN is only in the Application tests again.

[j143]

We verify the with gradients at the moment. but, we need to verify against R implementation once.