Class ExponentialWeight

  • All Implemented Interfaces:
    WeightFunction

    public final class ExponentialWeight
    extends java.lang.Object
    implements WeightFunction
    Exponential Weight function, scaled such that the result it 0.1 at distance equal max, so it does not completely disappear using: \( \exp(-2.3025850929940455 \frac{\text{distance}}{\max}) \)

    This is similar to the Gaussian weight function, except distance/max is not squared.

    -2.3025850929940455 is log(-.1) to achieve the intended range of 1.0 to 0.1

    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)
      Exponential Weight function. stddev is not used.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • ExponentialWeight

        public ExponentialWeight()
    • Method Detail

      • getWeight

        public double getWeight​(double distance,
                                double max,
                                double stddev)
        Exponential Weight function. stddev is not used.
        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