ReverseDistance() public method

Computes the squared distance in input space between two points given in feature space.
public ReverseDistance ( double x, double y ) : double
x double Vector x in feature (kernel) space.
y double Vector y in feature (kernel) space.
return double
TaylorGaussian Class Documentation
Example #1
0
        public void ExpandReverseDistanceTest()
        {
            for (int i = 1; i <= 3; i++)
            {
                TaylorGaussian kernel = new TaylorGaussian(i);

                kernel.Degree = 64000;

                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-3);
                Assert.IsFalse(double.IsNaN(phi_d));
                Assert.IsFalse(double.IsNaN(d));
            }
        }