public void NaiveSinglePassVarianceEntropyMetric_Impurity_Interval()
{
var set1 = new double[] { 0, 1, 2, 3, 4, 3, 2, 1, 0 };
var set2 = new double[] { 1, 1, 1, 1, 2, 2, 2, 2 };
var sut = new NaiveSinglePassVarianceImpurityMetric();
var interval = Interval1D.Create(2, 7);
var val1 = sut.Impurity(set1, interval);
Assert.AreEqual(0.69999999999999929, val1);
var val2 = sut.Impurity(set2, interval);
Assert.AreEqual(0.29999999999999982, val2);
}
public void NaiveSinglePassVarianceEntropyMetric_Impurity()
{
var set1 = new double[] { 0, 1, 2, 3, 4, 3, 2, 1, 0 };
var set2 = new double[] { 1, 1, 1, 1, 2, 2, 2, 2 };
var set3 = new double[] { 1 };
var sut = new NaiveSinglePassVarianceImpurityMetric();
var val1 = sut.Impurity(set1);
Assert.AreEqual(1.9444444444444446, val1);
var val2 = sut.Impurity(set2);
Assert.AreEqual(0.2857142857142857, val2);
var val3 = sut.Impurity(set3);
Assert.AreEqual(0.0, val3);
}
public void NaiveSinglePassVarianceEntropyMetric_Impurity_Interval_Weighted_2()
{
var set1 = new double[] { 0, 1, 2, 3, 4, 3, 2, 1, 0 };
var set2 = new double[] { 1, 1, 1, 1, 2, 2, 2, 2 };
var set3 = new double[] { 1 };
var weights = new double[] { 1, 2, 4, 7, 2, 3, 5, 8, 1 };
var sut = new NaiveSinglePassVarianceImpurityMetric();
var interval = Interval1D.Create(2, 7);
var val1 = sut.Impurity(set1, weights, Interval1D.Create(0, set1.Length));
Assert.AreEqual(1.2969432314410481, val1);
var val2 = sut.Impurity(set2, weights, Interval1D.Create(0, set2.Length));
Assert.AreEqual(0.29577464788732394, val2);
var val3 = sut.Impurity(set3, weights, Interval1D.Create(0, set3.Length));
Assert.AreEqual(0.0, val3);
}
public void NaiveSinglePassVarianceEntropyMetric_Impurity_Interval_Weighted_1()
{
var set1 = new double[] { 0, 1, 2, 3, 4, 3, 2, 1, 0 };
var set2 = new double[] { 1, 1, 1, 1, 2, 2, 2, 2 };
var set3 = new double[] { 1 };
var weights = new double[] { 1, 1, 1, 1, 1, 1, 1, 1, 1 };
var sut = new NaiveSinglePassVarianceImpurityMetric();
var interval = Interval1D.Create(2, 7);
var val1 = sut.Impurity(set1, weights, Interval1D.Create(0, set1.Length));
Assert.AreEqual(1.9444444444444446, val1);
var val2 = sut.Impurity(set2, weights, Interval1D.Create(0, set2.Length));
Assert.AreEqual(0.2857142857142857, val2);
var val3 = sut.Impurity(set3, weights, Interval1D.Create(0, set3.Length));
Assert.AreEqual(0.0, val3);
}