Subject
2 entries
Matrix Factorization
Bookmarks
Explicit Recommender System — Matrix Factorization in PyTorch
A tutorial implementing explicit recommender systems via matrix factorization in PyTorch — using Embedding layers for user and item factors, trained with alternating gradient descent. Concrete implementation of collaborative filtering fundamentals.
Implicit Feedback and Collaborative Filtering
A technical post on implicit feedback in collaborative filtering — when you have views, clicks, and dwell time instead of explicit ratings. Covers the ALS (alternating least squares) approach and linear algebra tricks for making matrix factorization tractable at scale.