Table 2 Comparison of preference similarity
From: A social trust and preference segmentation-based matrix factorization recommendation algorithm
Domains | Measures | |||||
|---|---|---|---|---|---|---|
Without preference domain segmentation | With preference domain segmentation | |||||
Values | ||||||
sim(ua, ub)COS | sim(ua, ub)Jaccard | sim(ua, ub)PCC | ssim(ua, ub)COS | ssim(ua, ub)Jaccard | ssim(ua, ub)PCC | |
Music | 0.53 | 0.50 | 0.29 | 0.78 | 0.75 | 0.97 |
Movies | -- | -- | -- | |||
Books | 0.82 | 0.67 | 0.00 | |||