ambit2.similarity.measure

Class BinaryKernelDistance

java.lang.Object

ambit2.similarity.measure.BinaryKernelDistance

All Implemented Interfaces:

IDistanceFunction<BitSet>

public class BinaryKernelDistance
extends Object
implements IDistanceFunction<BitSet>

Binary Kernel Discrimination method applied to fingerprints (bitset).

 KL(i,j) ) ([L^(N-dij)]*[(1 - L)^dij])^(k/N)
 where dij is the number of bits differing in fingerprint i and fingerprint j
 

Author:

Nina Jeliazkova nina@acad.bg

Field Summary

Fields

Modifier and Type	Field and Description
protected double	k
protected double	lambda

Constructor Summary

Constructors

Constructor and Description
BinaryKernelDistance()

Method Summary

Modifier and Type	Method and Description
float	getDistance(BitSet object1, BitSet object2) Distance should be large if objects are "far away" from each other, i.e.
double	getK()
double	getLambda()
float	getNativeComparison(BitSet object1, BitSet object2) Calculates native comparison index between two objects (distance or similarity).
void	setK(float k)
void	setLambda(double lambda)
void	setLambda(float lambda)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

lambda

protected double lambda

k

protected double k

Constructor Detail

BinaryKernelDistance

public BinaryKernelDistance()

Method Detail

getDistance

public float getDistance(BitSet object1,
                         BitSet object2)
                  throws Exception

Description copied from interface: IDistanceFunction

Distance should be large if objects are "far away" from each other, i.e. dissimilar.

Specified by:

getDistance in interface IDistanceFunction<BitSet>

Returns:

the distance

Throws:

Exception

getNativeComparison

public float getNativeComparison(BitSet object1,
                                 BitSet object2)
                          throws Exception

Description copied from interface: IDistanceFunction

Calculates native comparison index between two objects (distance or similarity). Similarity is large if objects are similar to each other, in contrast with IDistanceFunction.getDistance(Object, Object).

Specified by:

getNativeComparison in interface IDistanceFunction<BitSet>

Returns:

the distance

Throws:

Exception

getLambda

public double getLambda()

setLambda

public void setLambda(double lambda)

getK

public double getK()

setK

public void setK(float k)

setLambda

public void setLambda(float lambda)

toString

public String toString()

Overrides:

toString in class Object