RWRandGenerator

Module:  Essential Math    Group:  Statistics classes

Does not inherit

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

Members

deepenShallowCopy() operator() operator=()

printOn() reference() restart()

restoreFrom() RWRandGenerator() saveOn()

scanFrom()

Non-Members

operator>>()

operator<<()

#include <rw/randgen.h>
RWRandGenerator gen;

Class RWRandGenerator generates random numbers uniformly distributed over the interval [0, 1]. RWRandGenerator objects can be independent or share state with each other. The Essential Math Module contains a global default state that is shared by all generators created with the default constructor. Using the default generator state does not guarantee repeatable sequences, even if you restart() it using a specific seed. This is because the global state may be shared among several applications in a multithreaded environment. There is no protection against multiple threads of control using the global default state at the same time. To achieve repeatable sequences, you must construct a generator with a specific seed value and use the generator for random number generation.

RWRandGenerator();

Constructs a generator with the shared global default state.

RWRandGenerator(const RWRandGenerator& x);

Constructs a copy of x. The generators share state.

RWRandGenerator(long seed);

Constructs a generator with specified initial seed. The generator has its own state.

void
deepenShallowCopy();

Makes the state independent, but doesn't change it.

void
restart();

Restarts the generator with a random seed.

void
restart(long seed);

Restarts the generator with the specified seed.

void
reference(const RWRandGenerator& x);

Sets state to argument's state.

double
operator()();

Returns a random double in [0, 1].

RWRandGenerator&
operator=(const RWRandGenerator& x);

Sets state to argument's state.

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 RWRandGenerator& rgen);

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

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

Inputs an internal state from istream s to rgen.

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