Weighted matrix factorization method proposed by Hu et al. and Pan et al.
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C#
public class WRMF :  MF
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Y. Hu Y. Koren C. Volinsky Collaborative filtering for implicit feedback datasets IEEE International Conference on Data Mining (ICDM 2008) 2008 R. Pan Y. Zhou B. Cao N. N. Liu R. M. Lukose M. Scholz Q. Yang One-class collaborative filtering IEEE International Conference on Data Mining (ICDM 2008) 2008 We use the fast computation method proposed by Hu et al. and we allow a global weight to penalize observed/unobserved values. This engine does not support online updates.
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