public static void MatrixFactorizationTopNTest(double testSize = 0.125)
{
List <Rating> ratings = Tools.GetRatings(DefaultRatingFile, "::");
Tools.UpdateIndexesToZeroBased(ratings);
var data = Tools.TrainTestSplit(ratings, testSize);
var baseSamples = Tools.RandomSelectNegativeSamples(data.Item1, 1, true);
MatrixFactorization model = new MatrixFactorization(MaxUserId, MaxItemId, 100);
model.TrySGDForTopN(baseSamples, data.Item2, 100, 0.02, 0.01, 0.9);
}
public static void MatrixFactorizationTopNTest(int f = 10)
{
List <Rating> baseRatings = Tools.GetRatings(BaseRatingFile);
List <Rating> testRatings = Tools.GetRatings(TestRatingFile);
Tools.UpdateIndexesToZeroBased(baseRatings);
Tools.UpdateIndexesToZeroBased(testRatings);
var baseSamples = Tools.RandomSelectNegativeSamples(baseRatings, 4, true);
MatrixFactorization model = new MatrixFactorization(MaxUserId, MaxItemId, f);
model.TrySGDForTopN(baseSamples, testRatings, 100, 0.02, 0.01, 0.9);
}