RWRandGenMCG31M1

Module:  Essential Math   Group:  Statistics classes

Does not inherit

• Local Index
• Synopsis
• Description
• Public Constructors
• Public Member Operators
• Related Global Operator

Members

operator() printOn()

restoreFrom() RWRandGenMCG31M1()

saveOn() scanFrom()

Non-Members

operator>>()

operator<<()

#include <rw/randmcg31m1.h>
RWRandGenMCG31M1 gen;

Class RWRandGenMCG31M1 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<>.

RWRandGenMCG31M1 is a 31-bit multiplicative congruential generator.

x_n = ax_n-1(mod m)
u_n = x_n/m
a = 1132489760, m = 2³¹ - 1

Unlike RWRandGenerator, each instance of RWRandGenMCG31M1 contains and maintains its own, independent state. This can make it easier to use in some situations. The "internal state" of an instance of RWRandGenMCG31M1 consists of only a seed.

RWRandGenMCG31M1();

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

RWRandGenMCG31M1(const RWRandGenMCG31M1& x);

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

RWRandGenMCG31M1(unsigned long seed)

Constructs a generator with a specified seed.

double 
operator()();

Returns a random double in [0,1].

void 
printOn(std::ostream& s) const; 

Outputs a summary of self's internal state on ostream s.

void 
scanFrom(std::istream& s);

Inputs an internal state from istream s to self.

void 
restoreFrom(RWvistream&);
void 
restoreFrom(RWFile&);

Restores internal state of self from a virtual stream or an RWFile.

void 
saveOn(RWvostream&) const;
void 
saveOn(RWFile&) const;

Stores internal state of self to a virtual stream or in a binary format to an RWFile or RWvostream.

std::ostream& rwmathexport
operator<< (std::ostream& s, const RWRandGenMCG31M1& rgen);

Outputs a summary of rgen's internal state on ostream s.

std::istream& rwmathexport
operator>> (std::istream& s, RWRandGenMCG31M1& rgen);

Inputs an internal state from istream s to rgen.

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