com.gregdennis.drej
Class PolynomialKernel

java.lang.Object
  com.gregdennis.drej.PolynomialKernel

All Implemented Interfaces:

Kernel

public final class PolynomialKernel
extends java.lang.Object
implements Kernel

A polymonial kernel of the following form:

K(x1, x2) = (x1 · x2 + 1)^d

Author:

Greg Dennis (gdennis@mit.edu).

Field Summary

static PolynomialKernel	CUBIC_KERNEL Polynomial kernel of degree 3.
static PolynomialKernel	QUADRATIC_KERNEL Polynomial kernel of degree 2.

Constructor Summary

PolynomialKernel(int degree)
Construct a polynomial kernel with the specified degree.

Method Summary

int	degree() Returns the degree of this polynomial kernel.
double	eval(GVector x1, GVector x2) Evaluates the kernel function at the specified points.

Methods inherited from class java.lang.Object

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

Field Detail

QUADRATIC_KERNEL

public static final PolynomialKernel QUADRATIC_KERNEL

Polynomial kernel of degree 2.

CUBIC_KERNEL

public static final PolynomialKernel CUBIC_KERNEL

Polynomial kernel of degree 3.

Constructor Detail

PolynomialKernel

public PolynomialKernel(int degree)

Construct a polynomial kernel with the specified degree.

Method Detail

degree

public int degree()

Returns the degree of this polynomial kernel.

eval

public double eval(GVector x1,
                   GVector x2)

Description copied from interface: Kernel

Evaluates the kernel function at the specified points.

Specified by:

eval in interface Kernel