edu.indiana.util.distribution
Class UniformDistribution

java.lang.Object
  edu.indiana.util.distribution.UniformDistribution

All Implemented Interfaces:

Distribution, java.io.Serializable, java.lang.Cloneable

public class UniformDistribution
extends java.lang.Object
implements Distribution

A specification of a uniform random distribution.

See Also:

Serialized Form

Field Summary

protected double	high
protected double	low

Constructor Summary

UniformDistribution()
Construct a UniformDistribution.

UniformDistribution(double low, double high)
Creates new UniformDistribution

Method Summary

java.lang.Object	clone() Obtain a copy of this distribution.
boolean	equals(java.lang.Object other)
int	generateIntValue() Returns int value from low (inclusive) to high (exclusive).
double	generateValue() Generate a random value according to this distribution.
static void	main(java.lang.String[] args)
static int[]	pickDistinctIndices(int numToChoose, int low, int high)
static int	pickIndex(int low, int high) Use a uniform distribution to pick a value between low (inclusive) and high (exclusive).
void	setParameters(double[] parameters) Set the parameters for this distribution.
java.lang.String	toString() Obtain a String representation of this distribution.

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

low

protected double low

high

protected double high

Constructor Detail

UniformDistribution

public UniformDistribution()

Construct a UniformDistribution. Parameters must be set with setParameters().

UniformDistribution

public UniformDistribution(double low,
                           double high)

Creates new UniformDistribution

Method Detail

generateValue

public double generateValue()

Generate a random value according to this distribution.

Specified by:

generateValue in interface Distribution

generateIntValue

public int generateIntValue()

Returns int value from low (inclusive) to high (exclusive).

Specified by:

generateIntValue in interface Distribution

setParameters

public void setParameters(double[] parameters)

Set the parameters for this distribution. The first position in the array is the low value, and the second position is the high value.

Specified by:

setParameters in interface Distribution

pickIndex

public static int pickIndex(int low,
                            int high)

Use a uniform distribution to pick a value between low (inclusive) and high (exclusive). Useful for choosing an array position.

pickDistinctIndices

public static int[] pickDistinctIndices(int numToChoose,
                                        int low,
                                        int high)

Parameters:

low - int inclusive

high - int exclusive

Returns:

int[] Array of the chosen int indices, each distinct (no repeats)

toString

public java.lang.String toString()

Obtain a String representation of this distribution.

Specified by:

toString in interface Distribution

Overrides:

toString in class java.lang.Object

clone

public java.lang.Object clone()

Obtain a copy of this distribution.

Specified by:

clone in interface Distribution

Overrides:

clone in class java.lang.Object

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

main

public static void main(java.lang.String[] args)