Frequency-weighted Slope-One rating prediction
Daniel Lemire, Anna Maclachlan: Slope One Predictors for Online Rating-Based Collaborative Filtering. SIAM Data Mining (SDM 2005) http://www.daniel-lemire.com/fr/abstracts/SDM2005.html This recommender does NOT support incremental updates. They would be easy to implement, though.
상속: RatingPredictor
SlopeOne 1 문서
예제 #1
0
        public void TestNewUserInTestSet()
        {
            var recommender = new SlopeOne();

            var training_data = new Ratings();
            training_data.Add(0, 0, 1.0f);
            training_data.Add(1, 1, 5.0f);

            recommender.Ratings = training_data;
            recommender.Train();

            Assert.AreEqual( 3.0, recommender.Predict(2, 1) );
        }
예제 #2
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        public void TestNewItemInTestSet()
        {
            var recommender = new SlopeOne();
            recommender.MinRating = 1;
            recommender.MaxRating = 5;

            var training_data = new Ratings();
            training_data.Add(0, 0, 1.0);
            training_data.Add(1, 1, 5.0);

            recommender.Ratings = training_data;
            recommender.Train();

            Assert.AreEqual( 3.0, recommender.Predict(0, 2) );
        }