Catalano.Statistics.Kernels

Class Log

java.lang.Object

Catalano.Statistics.Kernels.Log

All Implemented Interfaces:

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

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

Logarithm Kernel. The Log kernel seems to be particularly interesting for images, but is only conditionally positive definite.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Log() Constructs a new Log kernel.

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Log

public Log()

Constructs a new Log kernel.

Method Detail

getDegree

public double getDegree()

Get the kernel's degree.

Returns:

The kernel's degree.

setDegree

public void setDegree(double degree)

Set the kernel's degree.

Parameters:

degree - The kernel's degree.

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.