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Consider the following user-item-rating matrix containing explicit feedback si...
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Consider the following user-item-rating matrix containing explicit feedback signals on a 7-point Likert-scale [1,7]. Zeros indicate unknown ratings.
| i1 | i2 | i3 | i4 | i5 | i6 | |
| u1 | 7 | 0 | 0 | 3 | 2 | 0 |
| u2 | 7 | 6 | 5 | 4 | 0 | 3 |
| u3 | 0 | 0 | 0 | 2 | 0 | 3 |
| u4 | 0 | 0 | 3 | 0 | 0 | 0 |
You want to build a memory-based User-KNN collaborative filtering recommender using Pearson correlation coefficient for user-user similarity computation.Compute user u1's rating bias.