Logarithmic

java.lang.Object

sim.util.distribution.AbstractDistribution

sim.util.distribution.AbstractContinuousDistribution

sim.util.distribution.Logarithmic

All Implemented Interfaces:: Serializable

public class Logarithmic extends AbstractContinuousDistribution

Logarithmic distribution.

Valid parameter ranges: 0 < p < 1.

Instance methods operate on a user supplied uniform random number generator; they are unsynchronized.

Static methods operate on a default uniform random number generator; they are synchronized.

Implementation:

Method: Inversion/Transformation.

This is a port of lsk.c from the C-RAND / WIN-RAND library. C-RAND's implementation, in turn, is based upon

A.W. Kemp (1981): Efficient generation of logarithmically distributed pseudo-random variables, Appl. Statist. 30, 249-253.

See Also:

Field Summary

Fields

Modifier and Type

Field

Description

protected double

my_p

Fields inherited from class sim.util.distribution.AbstractDistribution
randomGenerator
Constructor Summary

Constructors

Constructor

Description

Logarithmic(double p, MersenneTwisterFast randomGenerator)

Constructs a Logarithmic distribution.
Method Summary

Modifier and Type

Method

Description

double

nextDouble()

Returns a random number from the distribution.

double

nextDouble(double a)

Returns a random number from the distribution; bypasses the internal state.

void

setState(double p)

Sets the distribution parameter.

String

toString()

Returns a String representation of the receiver.

Methods inherited from class sim.util.distribution.AbstractDistribution
apply, apply, getRandomGenerator, nextInt, setRandomGenerator

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details
- my_p
  
  protected double my_p
Constructor Details
- Logarithmic
  
  public Logarithmic(double p, MersenneTwisterFast randomGenerator)
  
  Constructs a Logarithmic distribution.
Method Details
- nextDouble
  
  public double nextDouble()
  
  Returns a random number from the distribution.
  
  Specified by:
  
  nextDouble in class AbstractDistribution
- nextDouble
  
  public double nextDouble(double a)
  
  Returns a random number from the distribution; bypasses the internal state.
- setState
  
  public void setState(double p)
  
  Sets the distribution parameter.
- toString
  
  public String toString()
  
  Returns a String representation of the receiver.
  
  Overrides:
  
  toString in class Object