Collaborative Filtering with Side Information: a Gaussian Process Perspective

2016-05-23 · Hyunjik Kim, Xiaoyu Lu, Seth Flaxman, Yee Whye Teh

We tackle the problem of collaborative filtering (CF) with side information, through the lens of Gaussian Process (GP) regression. Driven by the idea of using the kernel to explicitly model user-item similarities, we formulate the GP in a way that allows the incorporation of low-rank matrix factorisation, arriving at our model, the Tucker Gaussian Process (TGP). Consequently, TGP generalises classical Bayesian matrix factorisation models, and goes beyond them to give a natural and elegant method for incorporating side information, giving enhanced predictive performance for CF problems. Moreover we show that it is a novel model for regression, especially well-suited to grid-structured data and problems where the dependence on covariates is close to being separable.

📄 PDF Abstract BibTeX arXiv:1605.07025

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Collaborative Filtering regression

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