~250,000 Ratings of ~3800 movies across 19 genres by 610 users on a scale of 1 to 5 stars. Zeros indicate no rating.
list of two components: ratings matrix in Matrix::dgCMatrix format of movies (rows) vs. users (columns), and genres as a sparse logical matrix in Matrix::lgCMatrix format, giving genres (rows) to which each movie (columns) is assigned.
Details
This dataset was derived from https://grouplens.org/datasets/movielens/ (ml-latest-small.zip), and movies without a genre assignment were removed. Half-star ratings were rounded up. Movies with fewer than 5 ratings were removed.