public void CanGetVariableCount()
{
var storage = new MdnnDoubleSpace(Samples, Variables);
Assert.AreEqual(Samples, storage.Samples);
Assert.AreEqual(Variables, storage.Variables);
}
public void GetMahalanobisDistanceComputesCorrectly(double[] sampleValues, double expectedMd)
{
var space = new MdnnDoubleSpace(GetGoodSpaceData());
var sample = new MdnnDoubleSample(sampleValues);
var result = GetMahalanobisDistance(space, sample);
Assert.IsTrue(Math.Abs(result - expectedMd) < 0.1);
}
public void FindUsefulVariablesDeterminesCorrectUsefulVariables()
{
var expected = new[] { false, true, true, true, false, true, true, true, true };
var goodSpace = new MdnnDoubleSpace(GetGoodSpaceData());
var badSpace = new MdnnDoubleSpace(GetBadSpaceData());
var result = FindUsefulVariables(goodSpace, badSpace);
CollectionAssert.AreEqual(expected, result);
}
public void CalculateZCorrectlyDeterminesZeroZ()
{
var matrix = new double[, ] {
{ 0, 0, 0 }, { 0, 0, 0 }
};
var space = new MdnnDoubleSpace(matrix);
var vector = new double[] { 0, 0, 0 };
var sample = new MdnnDoubleSample(vector);
var z = CalculateZ(space, sample);
CollectionAssert.AreEqual(vector, z.Storage);
}
public void MultiplyGetsCorrectResultForSpaceAndSample()
{
var values1 = new double[, ]
{
{ 1, -1, 2 },
{ 0, -3, 1 }
};
var space = new MdnnDoubleSpace(values1);
var values2 = new double[] { 2, 1 };
var sample = new MdnnDoubleSample(values2);
var result = new MdnnDoubleMtsMathProvider().Multiply(sample, space);
var expected = new double[] { 2, -5, 5 };
CollectionAssert.AreEqual(expected, result.Storage);
}
