Table 1 Rating records of a website
From: A social trust and preference segmentation-based matrix factorization recommendation algorithm
Users | Items | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Music | Movies | Books | ||||||||
\( {I}_1^1 \) | \( {I}_2^1 \) | \( {I}_3^1 \) | \( {I}_4^1 \) | \( {I}_1^2 \) | \( {I}_2^2 \) | \( {I}_3^2 \) | \( {I}_1^3 \) | \( {I}_2^3 \) | \( {I}_3^3 \) | |
ua | 4 | 2 | 5 | 0 | 0 | 0 | 0 | 5 | 4 | 5 |
ub | 4 | 1 | 5 | 5 | 3 | 5 | 1 | 1 | 0 | 2 |