public void TestRatioSplit()
{
var ratings = new TimedRatings();
ratings.Add(0, 0, 5.0f, new DateTime(2011, 10, 31));
ratings.Add(0, 1, 4.5f, new DateTime(2011, 11, 1));
ratings.Add(0, 2, 5.0f, new DateTime(2011, 11, 3));
ratings.Add(0, 3, 4.5f, new DateTime(2011, 11, 4));
ratings.Add(1, 0, 1.0f, new DateTime(2011, 10, 31));
ratings.Add(1, 1, 2.5f, new DateTime(2011, 11, 2));
ratings.Add(1, 2, 1.0f, new DateTime(2011, 12, 1));
ratings.Add(1, 3, 2.5f, new DateTime(2011, 12, 4));
var split1 = new RatingsPerUserChronologicalSplit(ratings, 0.25);
Assert.AreEqual(6, split1.Train[0].Count);
Assert.AreEqual(2, split1.Test[0].Count);
Assert.AreEqual(3, split1.Train[0].ByUser[0].Count);
Assert.AreEqual(3, split1.Train[0].ByUser[1].Count);
Assert.AreEqual(1, split1.Test[0].ByUser[0].Count);
Assert.AreEqual(1, split1.Test[0].ByUser[1].Count);
var split2 = new RatingsPerUserChronologicalSplit(ratings, 0.5);
Assert.AreEqual(4, split2.Train[0].Count);
Assert.AreEqual(4, split2.Test[0].Count);
Assert.AreEqual(2, split2.Train[0].ByUser[0].Count);
Assert.AreEqual(2, split2.Train[0].ByUser[1].Count);
Assert.AreEqual(2, split2.Test[0].ByUser[0].Count);
Assert.AreEqual(2, split2.Test[0].ByUser[1].Count);
}
public void TestRatioSplit()
{
var ratings = new TimedRatings();
ratings.Add(0, 0, 5.0f, new DateTime(2011, 10, 31));
ratings.Add(0, 1, 4.5f, new DateTime(2011, 11, 1));
ratings.Add(0, 2, 5.0f, new DateTime(2011, 11, 3));
ratings.Add(0, 3, 4.5f, new DateTime(2011, 11, 4));
ratings.Add(1, 0, 1.0f, new DateTime(2011, 10, 31));
ratings.Add(1, 1, 2.5f, new DateTime(2011, 11, 2));
ratings.Add(1, 2, 1.0f, new DateTime(2011, 12, 1));
ratings.Add(1, 3, 2.5f, new DateTime(2011, 12, 4));
var split1 = new RatingsPerUserChronologicalSplit(ratings, 0.25);
Assert.AreEqual(6, split1.Train[0].Count);
Assert.AreEqual(2, split1.Test[0].Count);
Assert.AreEqual(3, split1.Train[0].ByUser[0].Count);
Assert.AreEqual(3, split1.Train[0].ByUser[1].Count);
Assert.AreEqual(1, split1.Test[0].ByUser[0].Count);
Assert.AreEqual(1, split1.Test[0].ByUser[1].Count);
var split2 = new RatingsPerUserChronologicalSplit(ratings, 0.5);
Assert.AreEqual(4, split2.Train[0].Count);
Assert.AreEqual(4, split2.Test[0].Count);
Assert.AreEqual(2, split2.Train[0].ByUser[0].Count);
Assert.AreEqual(2, split2.Train[0].ByUser[1].Count);
Assert.AreEqual(2, split2.Test[0].ByUser[0].Count);
Assert.AreEqual(2, split2.Test[0].ByUser[1].Count);
}
