com.numericalmethod.suanshu.stats.random.univariate

Class LogNormalRng

java.lang.Object

com.numericalmethod.suanshu.stats.random.univariate.LogNormalRng

All Implemented Interfaces:

RandomNumberGenerator, java.io.Serializable

public class LogNormalRng
extends java.lang.Object
implements RandomNumberGenerator

This random number generator samples from the log-normal distribution.

The R equivalent class are dlnorm, plnorm, qlnorm, rlnorm.

See Also:

Wikipedia: Log-normal distribution, Serialized Form

Constructor Summary

Constructors

Constructor and Description
LogNormalRng(double logMean, double logSigma) Construct a random number generator to sample from the log-normal distribution.
LogNormalRng(NormalRng rnorm) Construct a random number generator to sample from the log-normal distribution.

Method Summary

Modifier and Type	Method and Description
double	nextDouble() Get the next random double.
void	seed(long... seeds) Seed the random number generator to produce repeatable sequences.

Methods inherited from class java.lang.Object

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

Constructor Detail

LogNormalRng

public LogNormalRng(NormalRng rnorm)

Construct a random number generator to sample from the log-normal distribution.

Parameters:

rnorm - a random number generator that samples from the normal distribution

LogNormalRng

public LogNormalRng(double logMean,
                    double logSigma)

Construct a random number generator to sample from the log-normal distribution.

Parameters:

logMean - the log of mean

logSigma - the log of standard deviation

Method Detail

seed

public void seed(long... seeds)

Description copied from interface: RandomNumberGenerator

Seed the random number generator to produce repeatable sequences.

Specified by:

seed in interface RandomNumberGenerator

Parameters:

seeds - the seeds

nextDouble

public double nextDouble()

Description copied from interface: RandomNumberGenerator

Get the next random double.

Specified by:

nextDouble in interface RandomNumberGenerator

Returns:

the next random number