Class Hyperbolic

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

    public class Hyperbolic
    extends AbstractContinousDistribution
    Hyperbolic distribution.

    Valid parameter ranges: alpha > 0 and beta > 0.

    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: Non-Universal Rejection. High performance implementation.
    This is a port of hyplc.c from the C-RAND / WIN-RAND library. C-RAND's implementation, in turn, is based upon

    L. Devroye (1986): Non-Uniform Random Variate Generation, Springer Verlag, New York.

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

      • alpha

        protected double alpha
      • beta

        protected double beta
      • a_setup

        protected double a_setup
      • b_setup

        protected double b_setup
      • x

        protected double x
      • u

        protected double u
      • v

        protected double v
      • e

        protected double e
      • hr

        protected double hr
      • hl

        protected double hl
      • s

        protected double s
      • pm

        protected double pm
      • pr

        protected double pr
      • samb

        protected double samb
      • pmr

        protected double pmr
      • mpa_1

        protected double mpa_1
      • mmb_1

        protected double mmb_1
    • Constructor Detail

      • Hyperbolic

        public Hyperbolic​(double alpha,
                          double beta,
                          RandomEngine randomGenerator)
        Constructs a Beta distribution.
    • Method Detail

      • nextDouble

        public double nextDouble​(double alpha,
                                 double beta)
        Returns a hyperbolic distributed random number; bypasses the internal state.
      • setState

        public void setState​(double alpha,
                             double beta)
        Sets the parameters.
      • staticNextDouble

        public static double staticNextDouble​(double alpha,
                                              double beta)
        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.