Package elki.similarity.kernel

Class RationalQuadraticKernel

java.lang.Object

elki.similarity.AbstractVectorSimilarity

elki.similarity.kernel.RationalQuadraticKernel

All Implemented Interfaces:

PrimitiveSimilarity<NumberVector>, Similarity<NumberVector>

public class RationalQuadraticKernel
extends AbstractVectorSimilarity

Rational quadratic kernel, a less computational approximation of the Gaussian RBF kernel (RadialBasisFunctionKernel).

Since:

0.6.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RationalQuadraticKernel.Par	Parameterization class.

Field Summary

Fields

Modifier and Type	Field	Description
private double	c	Constant term c.

Constructor Summary

Constructors

Constructor	Description
RationalQuadraticKernel(double c)	Constructor.

Method Summary

Modifier and Type	Method	Description
double	similarity(NumberVector o1, NumberVector o2)	Computes the similarity between two given DatabaseObjects according to this similarity function.

Methods inherited from class elki.similarity.AbstractVectorSimilarity

getInputTypeRestriction

Methods inherited from class java.lang.Object

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

Methods inherited from interface elki.similarity.PrimitiveSimilarity

instantiate

Methods inherited from interface elki.similarity.Similarity

isSymmetric

Field Detail

c

private final double c

Constant term c.

Constructor Detail

RationalQuadraticKernel

public RationalQuadraticKernel(double c)

Constructor.

Parameters:

c - Constant term c.

Method Detail

similarity

public double similarity(NumberVector o1,
                         NumberVector o2)

Description copied from interface: PrimitiveSimilarity

Computes the similarity between two given DatabaseObjects according to this similarity function.

Parameters:

o1 - first DatabaseObject

o2 - second DatabaseObject

Returns:

the similarity between two given DatabaseObjects according to this similarity function