Research Article
S2NMF: Information Self-Enhancement Self-Supervised Nonnegative Matrix Factorization for Recommendation
Table 2
Basic statistical information about the dataset.
| Statistical dimension | ML-100 k | ML-1 M | Amusic | Amovie |
| Number of users | 944 | 6,041 | 339,232 | 426,923 | Number of items | 1,683 | 3,707 | 83,047 | 23,966 | Number of interactions | 100,000 | 1,000,209 | 500,176 | 583,933 | Sparsity | 93.70% | 95.53% | 99.99% | 99.99% |
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