public void ExpandReverseDistanceTest()
{
Linear kernel = new Linear(42);
var x = new double[] { 0.5, 2.0 };
var y = new double[] { 1.3, -0.2 };
var phi_x = kernel.Transform(x);
var phi_y = kernel.Transform(y);
double d = Distance.SquareEuclidean(x, y);
double phi_d = kernel.ReverseDistance(phi_x, phi_y);
Assert.AreEqual(phi_d, d, 1e-10);
Assert.IsFalse(double.IsNaN(phi_d));
Assert.IsFalse(double.IsNaN(d));
}
public void ReverseDistanceTest()
{
var linear = new Linear(1);
double[] x = { 1, 1 };
double[] y = { 1, 1 };
double actual = linear.ReverseDistance(x, y);
double expected = 0;
Assert.AreEqual(expected, actual);
linear = new Linear(0);
x = new double[] { 0.2, 0.5 };
y = new double[] { 0.3, -0.7 };
actual = linear.ReverseDistance(x, y);
expected = Accord.Math.Distance.SquareEuclidean(x, y);
Assert.AreEqual(expected, actual);
}
