Package elki.math.linearalgebra.pca.weightfunctions

Class QuadraticWeight

  • All Implemented Interfaces:
    WeightFunction
    public final class QuadraticWeight
extends java.lang.Object
implements WeightFunction
    Quadratic weight function, scaled using the maximum to reach 0.1 at that point using: \( 1.0 - 0.9 \frac{\text{dist}^2}{\max^2}\} \)
    Since:
    0.2
    Author:
    Erich Schubert

    • Constructor Summary

      Constructors 
      Constructor Description
      QuadraticWeight()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      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