Introducing a Star Topology into Latent Class Models for Collaborative Filtering
نویسندگان
چکیده
Latent class models (LCM) represent the high dimensional data in a smaller dimensional space in terms of latent variables. They are able to automatically discover the patterns from the data. We present a topographic version of two LCMs for collaborative filtering and apply the models to a large collection of user ratings for films. Latent classes are topologically organized on a “star-like” structure. This makes orientation in rating patterns captured by latent classes easier and more systematic. The variation in film rating patterns is modelled by multinomial and binomial distributions with varying independence assumptions.
منابع مشابه
Making sense of sparse rating data in collaborative filtering via topographic organization of user preference patterns
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