[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