umontreal.iro.lecuyer.randvar
Class StudentPolarGen

java.lang.Object
  umontreal.iro.lecuyer.randvar.RandomVariateGen
      umontreal.iro.lecuyer.randvar.StudentGen
          umontreal.iro.lecuyer.randvar.StudentPolarGen

public class StudentPolarGen
extends StudentGen

This class implements Student random variate generators using the polar method of. The code is adapted from UNURAN.

The non-static nextDouble method generates two variates at a time and the second one is saved for the next call. A pair of variates is generated every second call. In the static case, two variates are generated per call but only the first one is returned and the second is discarded.

Constructor Summary

StudentPolarGen(RandomStream s, int n)
Creates a Student random variate generator with n degrees of freedom, using stream s.

StudentPolarGen(RandomStream s, StudentDist dist)
Creates a new generator for the Student distribution dist and stream s.

Method Summary

double	nextDouble() Generates a random number from the continuous distribution contained in this object.
static double	nextDouble(RandomStream s, int n)

Methods inherited from class umontreal.iro.lecuyer.randvar.StudentGen

getN

Methods inherited from class umontreal.iro.lecuyer.randvar.RandomVariateGen

getDistribution, getStream, nextArrayOfDouble, setStream, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

StudentPolarGen

public StudentPolarGen(RandomStream s,
                       int n)

Creates a Student random variate generator with n degrees of freedom, using stream s.

StudentPolarGen

public StudentPolarGen(RandomStream s,
                       StudentDist dist)

Creates a new generator for the Student distribution dist and stream s.

Method Detail

nextDouble

public double nextDouble()

Description copied from class: RandomVariateGen

Generates a random number from the continuous distribution contained in this object. By default, this method uses inversion by calling the inverseF method of the distribution object. Alternative generating methods are provided in subclasses.

Overrides:

nextDouble in class RandomVariateGen

Returns:

the generated value

nextDouble

public static double nextDouble(RandomStream s,
                                int n)