smile.math.random

Class MersenneTwister64

java.lang.Object

smile.math.random.MersenneTwister64

All Implemented Interfaces:

RandomNumberGenerator

public class MersenneTwister64
extends java.lang.Object
implements RandomNumberGenerator

Mersenne Twister 64-bit.

Similar to the regular Mersenne Twister but is implemented use 64-bit registers (Java long) and produces different output.

• Makato Matsumoto and Takuji Nishimura, "Mersenne Twister: A 623-Dimensionally Equidistributed Uniform Pseudo-Random Number Generator", ACM Transactions on Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3--30.

Constructor Summary

Constructors

Constructor and Description
MersenneTwister64() Constructor.
MersenneTwister64(long seed) Constructor.

Method Summary

Modifier and Type	Method and Description
int	next(int numbits) Returns up to 32 random bits.
double	nextDouble() Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.
void	nextDoubles(double[] d) Returns a vector of pseudorandom, uniformly distributed double values between 0.0 and 1.0 from this random number generator's sequence.
int	nextInt() Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.
int	nextInt(int n) Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.
long	nextLong() Returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence.
void	setSeed(long seed) Initialize the random generator with a seed.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MersenneTwister64

public MersenneTwister64()

Constructor.

MersenneTwister64

public MersenneTwister64(long seed)

Constructor.

Parameters:

seed -

Method Detail

setSeed

public void setSeed(long seed)

Description copied from interface: RandomNumberGenerator

Initialize the random generator with a seed.

Specified by:

setSeed in interface RandomNumberGenerator

next

public int next(int numbits)

Description copied from interface: RandomNumberGenerator

Returns up to 32 random bits.

Specified by:

next in interface RandomNumberGenerator

nextDouble

public double nextDouble()

Description copied from interface: RandomNumberGenerator

Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.

Specified by:

nextDouble in interface RandomNumberGenerator

nextDoubles

public void nextDoubles(double[] d)

Description copied from interface: RandomNumberGenerator

Returns a vector of pseudorandom, uniformly distributed double values between 0.0 and 1.0 from this random number generator's sequence.

Specified by:

nextDoubles in interface RandomNumberGenerator

nextInt

public int nextInt()

Description copied from interface: RandomNumberGenerator

Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.

Specified by:

nextInt in interface RandomNumberGenerator

nextInt

public int nextInt(int n)

Description copied from interface: RandomNumberGenerator

Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.

Specified by:

nextInt in interface RandomNumberGenerator

nextLong

public long nextLong()

Description copied from interface: RandomNumberGenerator

Returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence.

Specified by:

nextLong in interface RandomNumberGenerator