Environment for
DeveLoping
KDD-Applications
Supported by Index-Structures

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

java.lang.Object
  extended by de.lmu.ifi.dbs.elki.math.linearalgebra.pca.weightfunctions.InverseProportionalWeight
All Implemented Interfaces:
WeightFunction

public final class InverseProportionalWeight
extends Object
implements WeightFunction

Inverse proportional weight function, scaled using the maximum. 1 / (1 + distance/max)

Author:
Erich Schubert

Constructor Summary
InverseProportionalWeight()
           
 
Method Summary
 double getWeight(double distance, double max, double stddev)
          Get inverse proportional weight. stddev is ignored.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

InverseProportionalWeight

public InverseProportionalWeight()
Method Detail

getWeight

public double getWeight(double distance,
                        double max,
                        double stddev)
Get inverse proportional weight. stddev is ignored.

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

Release 0.2.1 (2009-07-13_1605)