Class Logarithmic

  • All Implemented Interfaces:
    DoubleFunction, IntFunction, java.io.Serializable, java.lang.Cloneable

    public class Logarithmic
    extends AbstractContinousDistribution
    Logarithmic distribution.

    Valid parameter ranges: 0 < p < 1.

    Instance methods operate on a user supplied uniform random number generator; they are unsynchronized.

    Static methods operate on a default uniform random number generator; they are synchronized.

    Implementation:

    Method: Inversion/Transformation.
    This is a port of lsk.c from the C-RAND / WIN-RAND library. C-RAND's implementation, in turn, is based upon

    A.W. Kemp (1981): Efficient generation of logarithmically distributed pseudo-random variables, Appl. Statist. 30, 249-253.

    Version:
    1.0, 09/24/99
    See Also:
    Serialized Form
    • Field Detail

      • my_p

        protected double my_p
      • t

        private double t
      • h

        private double h
      • a_prev

        private double a_prev
    • Constructor Detail

      • Logarithmic

        public Logarithmic​(double p,
                           RandomEngine randomGenerator)
        Constructs a Logarithmic distribution.
    • Method Detail

      • nextDouble

        public double nextDouble​(double a)
        Returns a random number from the distribution; bypasses the internal state.
      • setState

        public void setState​(double p)
        Sets the distribution parameter.
      • staticNextDouble

        public static double staticNextDouble​(double p)
        Returns a random number from the distribution.
      • toString

        public java.lang.String toString()
        Returns a String representation of the receiver.
        Overrides:
        toString in class java.lang.Object
      • xstaticSetRandomGenerator

        private static void xstaticSetRandomGenerator​(RandomEngine randomGenerator)
        Sets the uniform random number generated shared by all static methods.
        Parameters:
        randomGenerator - the new uniform random number generator to be shared.