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

java.lang.Object
  de.lmu.ifi.dbs.elki.math.linearalgebra.pca.weightfunctions.GaussWeight

All Implemented Interfaces:

WeightFunction, InspectionUtilFrequentlyScanned

public final class GaussWeight
extends Object
implements WeightFunction

Gaussian Weight function, scaled such that the result it 0.1 at distance == max exp(-2.3025850929940455 * (distance/max)^2)

Constructor Summary

GaussWeight()

Method Summary

double

getWeight(double distance, double max, double stddev) Get Gaussian weight. stddev is not used, scaled using max.

Methods inherited from class java.lang.Object

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

Constructor Detail

GaussWeight

public GaussWeight()

Method Detail

getWeight

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

Get Gaussian weight. stddev is not used, scaled using max.

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