Hi, I had a couple of questions regarding the matrix factorization initialization in lab 13. First off, why are the shapes of the item and user matrices given as (K, D) and (K, N) instead of (D, K) and (N, K) as done in the lectures? The other question I had was about the initialization that is used for the item matrix. Why is it randomly generated and then inserts the means of each item in the first row? Thanks in advance for your time :)
Lab 13 Matrix Factorization initialization
Hi, I had a couple of questions regarding the matrix factorization initialization in lab 13. First off, why are the shapes of the item and user matrices given as (K, D) and (K, N) instead of (D, K) and (N, K) as done in the lectures? The other question I had was about the initialization that is used for the item matrix. Why is it randomly generated and then inserts the means of each item in the first row? Thanks in advance for your time :)
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