Research Article
[Retracted] Using the Mathematical Model on Precision Marketing with Online Transaction Data Computing
Table 3
Comparison of performance results for the top 50% users.
| Top 50% users | SVD++ | User KNN | Item KNN |
| Proportion of recommendations coinciding with past purchase records | 10% | 10% | 0 | Maximum recommendation index | 18.12 | 16.52 | 2.27 | Average recommendation index | 8.33 | 7.34 | 1.93 |
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