RWRandGenMCG59 Class Reference

Generates random numbers uniformly distributed over the interval [0, 1]. More...

#include <rw/randmcg59.h>

Inheritance diagram for RWRandGenMCG59:

Public Member Functions
	RWRandGenMCG59 ()
	RWRandGenMCG59 (unsigned long seed)
	RWRandGenMCG59 (const RWRandGenMCG59 &u)
double	operator() ()
RWRandGenMCG59 &	operator= (const RWRandGenMCG59 &u)
Public Member Functions inherited from RWRandGenBasicMLC
void	printOn (std::ostream &s) const
void	restoreFrom (RWFile &file)
void	restoreFrom (RWvistream &s)
void	saveOn (RWFile &file) const
void	saveOn (RWvostream &s) const
void	scanFrom (std::istream &s)

Additional Inherited Members
Related Functions inherited from RWRandGenBasicMLC
std::ostream &	operator<< (std::ostream &s, const RWRandGenBasicMLC &gen)
std::istream &	operator>> (std::istream &s, RWRandGenBasicMLC &gen)

Detailed Description

Class RWRandGenMCG59 generates random numbers uniformly distributed over the interval [0, 1], and may be used instead of class RWRandGenerator as a template parameter to any of the distribution generators derived from abstract base class RWTRand. RWRandGenMCG59 is a 59-bit multiplicative congruential generator.

\[ \begin{align} x_{n} &= ax_{n-1}(\bmod m)\\ u_{n} &= x_{n}/m\\ a &= 13^{13}, m = 2^{59} \end{align} \]

Unlike class RWRandGenerator, each instance of RWRandGenMCG59 contains and maintains its own, independent state. This can make it easier to use in some situations. The "internal state" of an instance of RWRandGenMCG59 consists of only a seed.

Synopsis

#include <rw/randmcg59.h>
RWRandGenMCG59 gen;

Constructor & Destructor Documentation

RWRandGenMCG59::RWRandGenMCG59 ( )

inline

Constructs a generator, arbitrarily seeded by a call to the time() function.

RWRandGenMCG59::RWRandGenMCG59 ( unsigned long  seed )

inline

Constructs a generator with a specified seed.

RWRandGenMCG59::RWRandGenMCG59 ( const RWRandGenMCG59 &  u )

inline

Constructs a copy of u. The copy's state will equal the state of u at the time the copy is created, but will not share the state of u.

Member Function Documentation

double RWRandGenMCG59::operator() ( )

virtual

Returns a random double in [0,1].

Implements RWRandGenBasicMLC.

RWRandGenMCG59& RWRandGenMCG59::operator= ( const RWRandGenMCG59 &  u )

inline

Assigns a copy of u to self. The copy's state will equal the state of u at the time the copy is created, but will not share the state of u.