Data Science, Recommender Systems, Collaborative Filtering, Artificial Intelligence, Machine Learning.
predict the unseen item for a user, we simply multiply U, Σ, and T. Python Scipy has a nice implementation of SVD for sparse matrix. >>> from scipy.sparse import csc_matrix >>> from scipy.sparse.linalg import svds >>> A = csc_matrix([[1, 0, 0], [5, 0, 2], [0, -1, 0], [0, 0, 3]], dtype=float) >>> u,