edu.udo.cs.yale.operator.learner.kernel.evosvm
Class RBFKernel

java.lang.Object
  edu.udo.cs.yale.operator.learner.kernel.evosvm.Kernel
      edu.udo.cs.yale.operator.learner.kernel.evosvm.RBFKernel

public class RBFKernel
extends Kernel

Returns the value of the RBF kernel of both examples.

Version:

$Id: RBFKernel.java,v 1.5 2006/08/03 14:39:35 ingomierswa Exp $

Author:

Ingo Mierswa

Field Summary

private double

gamma The parameter gamma of the RBF kernel.

Fields inherited from class edu.udo.cs.yale.operator.learner.kernel.evosvm.Kernel

KERNEL_DOT, KERNEL_EPANECHNIKOV, KERNEL_GAUSSIAN_COMBINATION, KERNEL_MULTIQUADRIC, KERNEL_POLYNOMIAL, KERNEL_RADIAL, KERNEL_SIGMOID, KERNEL_TYPES

Constructor Summary

RBFKernel()

Method Summary

double	calculateDistance(double[] x1, double[] x2) Calculates kernel value of vectors x and y.
double	getGamma()
int	getType() Must return one out of KERNEL_DOT, KERNEL_RADIAL, KERNEL_POLYNOMIAL, or KERNEL_SIGMOID.
void	readKernelParameters(java.io.ObjectInputStream in) Reads the value for gamma from the given stream.
void	setGamma(double gamma)
void	writeKernelParameters(java.io.ObjectOutputStream out) Writes the value for gamma into the given stream.

Methods inherited from class edu.udo.cs.yale.operator.learner.kernel.evosvm.Kernel

createKernel, createKernel, getDistance, getSum, init, innerProduct, norm2, readKernelData, writeKernelData

Methods inherited from class java.lang.Object

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

Field Detail

gamma

private double gamma

The parameter gamma of the RBF kernel.

Constructor Detail

RBFKernel

public RBFKernel()

Method Detail

getType

public int getType()

Description copied from class: Kernel

Must return one out of KERNEL_DOT, KERNEL_RADIAL, KERNEL_POLYNOMIAL, or KERNEL_SIGMOID.

Specified by:

getType in class Kernel

setGamma

public void setGamma(double gamma)

getGamma

public double getGamma()

calculateDistance

public double calculateDistance(double[] x1,
                                double[] x2)

Calculates kernel value of vectors x and y.

Specified by:

calculateDistance in class Kernel

readKernelParameters

public void readKernelParameters(java.io.ObjectInputStream in)
                          throws java.io.IOException

Reads the value for gamma from the given stream.

Specified by:

readKernelParameters in class Kernel

Throws:

java.io.IOException

writeKernelParameters

public void writeKernelParameters(java.io.ObjectOutputStream out)
                           throws java.io.IOException

Writes the value for gamma into the given stream.

Specified by:

writeKernelParameters in class Kernel

Throws:

java.io.IOException