Baseline: predict by a constant rating
Baseline: predict by average rating of all users
Baseline: predict by the average of target item's ratings
It is a graphical model that clusters items into K groups for recommendation, as opposite to the
Baseline: items are weighted by the number of ratings they received.
Baseline: predict by a random value in (minRate, maxRate)
Baseline: predict by the average of target user's ratings
It is a graphical model that clusters users into K groups for recommendation, see reference: Barbieri et al., Probabilistic Approaches to Recommendations (Section 2.2), Synthesis Lectures on Data Mining and Knowledge Discovery, 2014.
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