Data := User-Item Interac)ons using Recommendation using SparseArrays data = DataAccessor(sparse([1 0 0; 4 5 0])) n_user, n_item = 5, 10 events = [Event(1, 2, 1.0), Event(3, 2, 1.0), Event(2, 6, 4.0)] data = DataAccessor(events, n_user, n_item) Explicit ra)ngs