uk.ac.ed.inf.utils.stats
Class PseudoTruncatedPareto

java.lang.Object
  cern.colt.PersistentObject
      cern.jet.random.AbstractDistribution
          cern.jet.random.AbstractContinousDistribution
              cern.jet.random.Pareto
                  uk.ac.ed.inf.utils.stats.TruncatedPareto
                      uk.ac.ed.inf.utils.stats.PseudoTruncatedPareto

All Implemented Interfaces:

DoubleFunction, IntFunction, java.io.Serializable, java.lang.Cloneable

public class PseudoTruncatedPareto
extends TruncatedPareto

A truncated pareto distribution which stores a big lists of power-law extracted random numbers. Used to work around the performance problems of the Pareto distribution.

Version:

4 Aug 2008

Author:

Luna De Ferrari luna.deferrari-at-ed.ac.uk

See Also:

Serialized Form

Constructor Summary

PseudoTruncatedPareto(double scale, double shape, int offset, int truncationThreshold, int lengthOfPseudoRandomList)

Method Summary

java.lang.Integer[]	getPseudoRandomNumbers()
int	nextPseudoInt()

Methods inherited from class uk.ac.ed.inf.utils.stats.TruncatedPareto

getOffset, getPareto, getParetoFrequencies, getTruncationThreshold, nextInt

Methods inherited from class cern.jet.random.Pareto

cdf, nextDouble, nextDouble, pdf, setState, staticNextDouble, toString

Methods inherited from class cern.jet.random.AbstractDistribution

apply, apply, clone, makeDefaultGenerator

Methods inherited from class java.lang.Object

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

Constructor Detail

PseudoTruncatedPareto

public PseudoTruncatedPareto(double scale,
                             double shape,
                             int offset,
                             int truncationThreshold,
                             int lengthOfPseudoRandomList)

Parameters:

scale - the power law distribution scale

shape - the power law distribution shape

offset - an offset (all extracted numbers will start from the offset)

truncationThreshold - a truncation threshold (no extracted number will be above the threshold)

lengthOfPseudoRandomList - the length of the list of power-law distributed random numbers to be stored

Method Detail

getPseudoRandomNumbers

public java.lang.Integer[] getPseudoRandomNumbers()

nextPseudoInt

public int nextPseudoInt()