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

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

public final class QuadraticWeight
extends Object
implements WeightFunction

Quadratic weight function, scaled using the maximum to reach 0.1 at that point. 1.0 - 0.9 * (distance/max)^2


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

Constructor Detail

QuadraticWeight

public QuadraticWeight()
Method Detail

getWeight

public double getWeight(double distance,
                        double max,
                        double stddev)
Evaluate quadratic 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 0.4.0 (2011-09-20_1324)