Catalano.Statistics.Kernels

Class Spherical

java.lang.Object

Catalano.Statistics.Kernels.Spherical

All Implemented Interfaces:

IMercerKernel<double[]>, java.io.Serializable

public class Spherical
extends java.lang.Object
implements IMercerKernel<double[]>

Spherical Kernel. The spherical kernel comes from a statistics perspective. It is an example of an isotropic stationary kernel and is positive definite in R^3.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Spherical() Constructs a new Spherical kernel.
Spherical(double sigma) Constructs a new Spherical kernel.

Method Summary

Modifier and Type	Method and Description
double	Function(double[] x, double[] y) The kernel function.
double	getSigma() Get the kernel's sigma value.
void	setDegree(double value) Set the kernel's sigma value.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Spherical

public Spherical()

Constructs a new Spherical kernel.

Spherical

public Spherical(double sigma)

Constructs a new Spherical kernel.

Parameters:

sigma - Sigma value.

Method Detail

getSigma

public double getSigma()

Get the kernel's sigma value.

Returns:

The kernel's sigma value.

setDegree

public void setDegree(double value)

Set the kernel's sigma value.

Parameters:

value - The kernel's sigma value.

Function

public double Function(double[] x,
                       double[] y)

Description copied from interface: IMercerKernel

The kernel function.

Specified by:

Function in interface IMercerKernel<double[]>

Parameters:

x - Vector x in input space.

y - Vector y in input space.

Returns:

Dot product in feature (kernel) space.