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

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

public class SigmoidKernel
extends Kernel

Returns the value of a Sigmoid kernel of both examples.

Version:

$Id: SigmoidKernel.java,v 1.4 2006/08/03 14:39:35 ingomierswa Exp $

Author:

Ingo Mierswa

Field Summary

private double	a The parameter a of the sigmoid kernel.
private double	b The parameter b of the sigmoid 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

SigmoidKernel()

Method Summary

double	calculateDistance(double[] x1, double[] x2) Subclasses must implement this method.
int	getType() Must return one out of KERNEL_DOT, KERNEL_RADIAL, KERNEL_POLYNOMIAL, or KERNEL_SIGMOID.
void	readKernelParameters(java.io.ObjectInputStream in) Reads the kernel parameters from the given stream.
void	setSigmoidParameters(double a, double b) Sets the parameters of this Sigmoid kernel to the given values a and b.
void	writeKernelParameters(java.io.ObjectOutputStream out) Writes the kernel parameters 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

a

private double a

The parameter a of the sigmoid kernel.

b

private double b

The parameter b of the sigmoid kernel.

Constructor Detail

SigmoidKernel

public SigmoidKernel()

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

setSigmoidParameters

public void setSigmoidParameters(double a,
                                 double b)

Sets the parameters of this Sigmoid kernel to the given values a and b.

calculateDistance

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

Subclasses must implement this method.

Specified by:

calculateDistance in class Kernel

readKernelParameters

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

Reads the kernel parameters 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 kernel parameters into the given stream.

Specified by:

writeKernelParameters in class Kernel

Throws:

java.io.IOException