de.lmu.ifi.dbs.elki.math.linearalgebra.pca.weightfunctions

Class InverseLinearWeight

java.lang.Object

de.lmu.ifi.dbs.elki.math.linearalgebra.pca.weightfunctions.InverseLinearWeight

All Implemented Interfaces:

WeightFunction

public final class InverseLinearWeight
extends java.lang.Object
implements WeightFunction

Inverse Linear Weight Function. This weight is not particularly reasonable. Instead it serves the purpose of testing the effects of a badly chosen weight function. This function has increasing weight, from 0.1 to 1.0 at distance == max.

Since:

0.2

Author:

Erich Schubert

Constructor Summary

Constructors

Constructor and Description
InverseLinearWeight()

Method Summary

Modifier and Type	Method and Description
double	getWeight(double distance, double max, double stddev) Linear increasing weight, from 0.1 to 1.0 NOTE: increasing weights are non-standard, and mostly for testing

Methods inherited from class java.lang.Object

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

Constructor Detail

InverseLinearWeight

public InverseLinearWeight()

Method Detail

getWeight

public double getWeight(double distance,
                        double max,
                        double stddev)

Linear increasing weight, from 0.1 to 1.0 NOTE: increasing weights are non-standard, and mostly for testing

Specified by:

getWeight in interface WeightFunction

Parameters:

distance - distance of the query point

max - maximum distance of all included points

stddev - standard deviation (i.e. quadratic mean / RMS) of the included points

Returns:

weight for the query point