de.lmu.ifi.dbs.elki.distance.similarityfunction.kernel

Class RationalQuadraticKernelFunction

java.lang.Object

de.lmu.ifi.dbs.elki.distance.similarityfunction.AbstractPrimitiveSimilarityFunction<NumberVector<?>,DoubleDistance>

de.lmu.ifi.dbs.elki.distance.similarityfunction.AbstractVectorDoubleSimilarityFunction

de.lmu.ifi.dbs.elki.distance.similarityfunction.kernel.RationalQuadraticKernelFunction

All Implemented Interfaces:

PrimitiveDoubleSimilarityFunction<NumberVector<?>>, PrimitiveSimilarityFunction<NumberVector<?>,DoubleDistance>, SimilarityFunction<NumberVector<?>,DoubleDistance>, Parameterizable

public class RationalQuadraticKernelFunction
extends AbstractVectorDoubleSimilarityFunction

Provides the rational quadratic kernel, a less computational approximation of the Gaussian RBF kerne (RadialBasisFunctionKernelFunction).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RationalQuadraticKernelFunction.Parameterizer Parameterization class.

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
RationalQuadraticKernelFunction(double c) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
double	doubleSimilarity(NumberVector<?> o1, NumberVector<?> o2) Computes the similarity between two given Objects according to this similarity function.

Methods inherited from class de.lmu.ifi.dbs.elki.distance.similarityfunction.AbstractVectorDoubleSimilarityFunction

getDistanceFactory, getInputTypeRestriction, similarity

Methods inherited from class de.lmu.ifi.dbs.elki.distance.similarityfunction.AbstractPrimitiveSimilarityFunction

instantiate, isSymmetric

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.distance.similarityfunction.SimilarityFunction

instantiate, isSymmetric

Field Detail

c

private final double c

Constant term c.

Constructor Detail

RationalQuadraticKernelFunction

public RationalQuadraticKernelFunction(double c)

Constructor.

Parameters:

c - Constant term c.

Method Detail

doubleSimilarity

public double doubleSimilarity(NumberVector<?> o1,
                      NumberVector<?> o2)

Description copied from interface: PrimitiveDoubleSimilarityFunction

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

Parameters:

o1 - first Object

o2 - second Object

Returns:

the similarity between two given Objects according to this similarity function