Package elki.math.linearalgebra.pca.weightfunctions

Class InverseLinearWeight

  • All Implemented Interfaces:
    WeightFunction
    public final class InverseLinearWeight
extends java.lang.Object
implements WeightFunction
    Inverse linear weight function using \(.1+0.9\frac{\text{distance}}{\max}\).

    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 when the distance equals the maximum.

    Since:
    0.2
    Author:
    Erich Schubert

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      double getWeight​(double distance, double max, double stddev)
      Linear increasing weight, from 0.1 to 1.0

      • 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