library: libCore
#include "TRandom1.h" |
TRandom1
class description - header file - source file - inheritance tree (.pdf)
public:
TRandom1()
TRandom1(UInt_t seed, Int_t lux = 3)
TRandom1(Int_t rowIndex, Int_t colIndex, Int_t lux)
TRandom1(const TRandom1&)
virtual ~TRandom1()
static TClass* Class()
virtual Int_t GetLuxury() const
static void GetTableSeeds(UInt_t* seeds, Int_t index)
const UInt_t* GetTheSeeds() const
virtual TClass* IsA() const
virtual Double_t Rndm(Int_t i = 0)
virtual void RndmArray(Int_t size, Float_t* vect)
virtual void RndmArray(Int_t size, Double_t* vect)
virtual void SetSeed(UInt_t seed)
virtual void SetSeed2(UInt_t seed, Int_t lux = 3)
virtual void SetSeeds(const UInt_t* seeds, Int_t lux = 3)
virtual void ShowMembers(TMemberInspector& insp, char* parent)
virtual void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
protected:
Int_t fNskip
Int_t fLuxury
Int_t fIlag
Int_t fJlag
Int_t fCount24
Float_t fFloatSeedTable[24]
Float_t fCarry
const Int_t fIntModulus
static Int_t fgNumEngines
static Int_t fgMaxIndex
const UInt_t* fTheSeeds
const Double_t fMantissaBit24
const Double_t fMantissaBit12
TRandom1
The Ranlux Random number generator class
The algorithm for this random engine has been taken from the original
implementation in FORTRAN by Fred James as part of CLHEP.
The initialisation is carried out using a Multiplicative Congruential
generator using formula constants of L'Ecuyer as described in "F.James,
Comp. Phys. Comm. 60 (1990) 329-344".
TRandom1(UInt_t seed, Int_t 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.
TRandom1(int rowIndex, int colIndex, int lux)
constructor
void SetSeed2(UInt_t 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
modified for the case of seed = 0. In that case a random 64 bits seed based on
TUUID (using TRandom3(0) ) is generated in order to have a unique seed
void SetSeed(UInt_t seed)
Set RanLux seed using default luxury level
Author: Rene Brun from CLHEP & CERNLIB 04/05/2006
Last update: root/base:$Name: $:$Id: TRandom1.cxx,v 1.6 2006/05/30 11:53:50 brun Exp $
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