Table 5: Content-boosted CF and its variations (a) content data and originally sparse rating data (b) pseudorating data filled by content predictor (c) predictions from (weighted) Pearson CF on the pseudo rating data.
(a)

Content informationRating matrix

AgeSexCareerzipI1I2I3I4I5
U132Fwriter229044
U227Mstudent10022243
U324Mengineer604021
U450Fother608043333
U528Meducator852511

(b)

Pseudo rating data

I1I2I3I4I5
23432
22432
31343
33333
12412

(c)

Pearson-CF prediction

I1I2I3I4I5
23423
34223
33233
33333
13122