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jcastro-inf / delfos

delfos: DEveLopers' Framework of Suggestions is a recommender systems library that has a number of recommendation algorithms, datasets, experimentation protocols and metrics to perform experiments to evaluate and compare recommendation techniques.
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Fix nan in ndcg #16

Closed jcastro-inf closed 8 years ago

jcastro-inf commented 8 years ago

Book Crossing implicit ratings were producing a division by zero in NDCG due to rating value is zero