de.lmu.ifi.dbs.elki.distance.distancefunction.minkowski

Class LPIntegerNormDistanceFunction

java.lang.Object

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractPrimitiveDistanceFunction<NumberVector>

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractNumberVectorDistanceFunction

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractNumberVectorNorm

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractSpatialNorm

de.lmu.ifi.dbs.elki.distance.distancefunction.minkowski.LPNormDistanceFunction

de.lmu.ifi.dbs.elki.distance.distancefunction.minkowski.LPIntegerNormDistanceFunction

All Implemented Interfaces:

DistanceFunction<NumberVector>, Norm<NumberVector>, NumberVectorDistanceFunction<NumberVector>, PrimitiveDistanceFunction<NumberVector>, SpatialPrimitiveDistanceFunction<NumberVector>

Direct Known Subclasses:

EuclideanDistanceFunction, ManhattanDistanceFunction

public class LPIntegerNormDistanceFunction
extends LPNormDistanceFunction

LP-Norm for NumberVectors, optimized version for integer values of p. This will likely not have huge impact, but may vary from CPU and virtual machine version.

Author:

Erich Schubert

Nested Class Summary

Nested Classes

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

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	intp Integer value of p.

Fields inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.minkowski.LPNormDistanceFunction

invp, p

Constructor Summary

Constructors

Constructor and Description
LPIntegerNormDistanceFunction(int p) Constructor, internal version.

Method Summary

Methods

Modifier and Type	Method and Description
double	distance(NumberVector v1, NumberVector v2) Computes the distance between two given DatabaseObjects according to this distance function.
double	minDist(SpatialComparable mbr1, SpatialComparable mbr2) Computes the distance between the two given MBRs according to this distance function.
double	norm(NumberVector v) Compute the norm of object obj.
private double	preDistance(NumberVector v1, NumberVector v2, int start, int end, double agg)
private double	preDistanceMBR(SpatialComparable mbr1, SpatialComparable mbr2, int start, int end, double agg)
private double	preDistanceVM(NumberVector v, SpatialComparable mbr, int start, int end, double agg)
private double	preNorm(NumberVector v, int start, int end, double agg)
private double	preNormMBR(SpatialComparable mbr, int start, int end, double agg)

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.minkowski.LPNormDistanceFunction

equals, getInputTypeRestriction, getP, isMetric, toString

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractSpatialNorm

instantiate

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractNumberVectorDistanceFunction

dimensionality, dimensionality, dimensionality, dimensionality

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractPrimitiveDistanceFunction

isSymmetric

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.distance.distancefunction.DistanceFunction

isSymmetric

Field Detail

intp

int intp

Integer value of p.

Constructor Detail

LPIntegerNormDistanceFunction

public LPIntegerNormDistanceFunction(int p)

Constructor, internal version.

Parameters:

p - Parameter p

Method Detail

preDistance

private final double preDistance(NumberVector v1,
                 NumberVector v2,
                 int start,
                 int end,
                 double agg)

preDistanceVM

private final double preDistanceVM(NumberVector v,
                   SpatialComparable mbr,
                   int start,
                   int end,
                   double agg)

preDistanceMBR

private final double preDistanceMBR(SpatialComparable mbr1,
                    SpatialComparable mbr2,
                    int start,
                    int end,
                    double agg)

preNorm

private final double preNorm(NumberVector v,
             int start,
             int end,
             double agg)

preNormMBR

private final double preNormMBR(SpatialComparable mbr,
                int start,
                int end,
                double agg)

distance

public double distance(NumberVector v1,
              NumberVector v2)

Description copied from interface: PrimitiveDistanceFunction

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

Specified by:

distance in interface NumberVectorDistanceFunction<NumberVector>

Specified by:

distance in interface PrimitiveDistanceFunction<NumberVector>

Overrides:

distance in class LPNormDistanceFunction

Parameters:

v1 - first DatabaseObject

v2 - second DatabaseObject

Returns:

the distance between two given DatabaseObjects according to this distance function

norm

public double norm(NumberVector v)

Description copied from interface: Norm

Compute the norm of object obj.

Specified by:

norm in interface Norm<NumberVector>

Overrides:

norm in class LPNormDistanceFunction

Parameters:

v - Object

Returns:

Norm

minDist

public double minDist(SpatialComparable mbr1,
             SpatialComparable mbr2)

Description copied from interface: SpatialPrimitiveDistanceFunction

Computes the distance between the two given MBRs according to this distance function.

Specified by:

minDist in interface SpatialPrimitiveDistanceFunction<NumberVector>

Overrides:

minDist in class LPNormDistanceFunction

Parameters:

mbr1 - the first MBR object

mbr2 - the second MBR object

Returns:

the distance between the two given MBRs according to this distance function