CF
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Item-Item Collaborative FilteringMLAI/RecommendSystem 2022. 7. 12. 14:49
Intuition The correlation between the column vectors is high If you like Power Rangers, you'll also like Transformers because users give them similar ratings Power Rangers Transformers Ninja Turtles User 1 4.5 5 4 User 2 5 5 4.5 User 3 1 2 0.5 User 4 2 2 0.5 User-User Collaborative Filtering For user-user CF, I want to find "users like me" The movies that those users have seen, that I haven't se..
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User-User Collaborative FilteringMLAI/RecommendSystem 2022. 7. 7. 17:41
Batman X-Men Star Wars The Notebook Bridget Jones' Diary Alice 5 4.5 5 2 1 Bob 4.5 4 2 2 Carol 2 3 1 5 5 Intuitively, we see that Bob’s ratings are similar to Alice’s, thus he is likely to also like Star Wars. In math-speak, Alice’s and Bob’s ratings are highly correlated. Average Rating Limitations It treats everyone’s rating of the movie. equally. Bob’s s(i, j) equally depends on Alice’s ratin..