de.gsi.math

Class TRandom1

java.lang.Object

de.gsi.math.TRandom

de.gsi.math.TRandom1

public class TRandom1
extends TRandom

Field Summary

Fields

Modifier and Type	Field and Description
protected float	fCarry
protected int	fCount24
protected float[]	fFloatSeedTable
protected static int	fgMaxIndex
protected static int	fgNumEngines
protected int	fIlag
protected int	fIntModulus
protected int	fJlag
protected int	fLuxury
protected double	fMantissaBit12
protected double	fMantissaBit24
protected int	fNskip
protected long	fTheSeeds

Fields inherited from class de.gsi.math.TRandom

fSeed

Constructor Summary

Constructors

Constructor and Description
TRandom1() default constructor
TRandom1(long seed, int lux) Luxury level is set in the same way as the original FORTRAN routine.

Method Summary

Modifier and Type	Method and Description
double	Rndm(int rnd) return a random number in ]0,1]
void	RndmArray(int size, double[] vect) return an array of random numbers in ]0,1]
void	RndmArray(int size, float[] vect) return an array of random numbers in ]0,1]
void	SetSeed(long seed) Set RanLux seed using default luxury level
void	SetSeed2(long seed, int lux) The initialisation is carried out using a Multiplicative Congruential generator using formula constants of L'Ecuyer as described in "A review of pseudorandom number generators" (Fred James) published in Computer Physics Communications 60 (1990) pages 329-344
void	SetSeeds(long seeds, int lux) set seeds

Methods inherited from class de.gsi.math.TRandom

Binomial, BreitWigner, Circle, Exp, Gaus, Integer, Landau, Poisson, PoissonD, Rannor, Rannor, Rndm, Sphere, toString, Uniform, Uniform

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

fgNumEngines

protected static int fgNumEngines

fgMaxIndex

protected static int fgMaxIndex

fNskip

protected int fNskip

fLuxury

protected int fLuxury

fIlag

protected int fIlag

fJlag

protected int fJlag

fCount24

protected int fCount24

fFloatSeedTable

protected float[] fFloatSeedTable

fCarry

protected float fCarry

fIntModulus

protected final int fIntModulus

fTheSeeds

protected final long fTheSeeds

fMantissaBit24

protected final double fMantissaBit24

fMantissaBit12

protected final double fMantissaBit12

Constructor Detail

TRandom1

public TRandom1()

default constructor

TRandom1

public TRandom1(long seed,
                int lux)

Luxury level is set in the same way as the original FORTRAN routine. level 0 (p=24): equivalent to the original RCARRY of Marsaglia and Zaman, very long period, but fails many tests. level 1 (p=48): considerable improvement in quality over level 0, now passes the gap test, but still fails spectral test. level 2 (p=97): passes all known tests, but theoretically still defective. level 3 (p=223): DEFAULT VALUE. Any theoretically possible correlations have very small chance of being observed. level 4 (p=389): highest possible luxury, all 24 bits chaotic.

Parameters:

seed - initial seed

lux - initial luxury

Method Detail

Rndm

public double Rndm(int rnd)

return a random number in ]0,1]

Parameters:

rnd - empty seed

Returns:

random number in ]0,1]

RndmArray

public void RndmArray(int size,
                      double[] vect)

return an array of random numbers in ]0,1]

Parameters:

size - size of storage vector

vect - storage vector

RndmArray

public void RndmArray(int size,
                      float[] vect)

return an array of random numbers in ]0,1]

Overrides:

RndmArray in class TRandom

Parameters:

size - length of array

vect - storage array

SetSeed

public void SetSeed(long seed)

Set RanLux seed using default luxury level

Overrides:

SetSeed in class TRandom

Parameters:

seed - initial seed

SetSeed2

public void SetSeed2(long seed,
                     int lux)

The initialisation is carried out using a Multiplicative Congruential generator using formula constants of L'Ecuyer as described in "A review of pseudorandom number generators" (Fred James) published in Computer Physics Communications 60 (1990) pages 329-344

Parameters:

seed - initial seed

lux - initial luxury

SetSeeds

public void SetSeeds(long seeds,
                     int lux)

set seeds

Parameters:

seeds - initial seed

lux - initial luxury