javanpst.distributions.common.continuous

Class ChiSquareDistribution

java.lang.Object

javanpst.distributions.common.continuous.ChiSquareDistribution

All Implemented Interfaces:

Distribution

public final class ChiSquareDistribution
extends java.lang.Object
implements Distribution

A chi-square distribution. Uses a inner gamma distribution.

Constructor Summary

Constructors

Constructor and Description
ChiSquareDistribution() Default builder.
ChiSquareDistribution(ChiSquareDistribution old) Copy constructor Creates a copy of a given chi-square distribution
ChiSquareDistribution(int degree) Builder.

Method Summary

Modifier and Type	Method and Description
double	computeCumulativeProbability(double value) Computes cumulative probability at a given point of the chi-square distribution.
double	computeProbability(double value) Computes mass probability at a given point of the chi-square distribution.
double	computeRightTailProbability(double value) Computes the right tail of chi-square distribution
int	getDegree() Gets the number of degrees of freedom of the distribution
void	setDegree(int value) Sets the number of degrees of freedom of the distribution
java.lang.String	toString() To String method.

Methods inherited from class java.lang.Object

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

Constructor Detail

ChiSquareDistribution

public ChiSquareDistribution()

Default builder. Creates a chi-square distribution with 1 degree of freedom

ChiSquareDistribution

public ChiSquareDistribution(int degree)

Builder. Creates a chi-square distribution with specified degrees of freedom

Parameters:

degree - degrees of freedom

ChiSquareDistribution

public ChiSquareDistribution(ChiSquareDistribution old)

Copy constructor Creates a copy of a given chi-square distribution

Parameters:

old - chi-square distribution to copy

Method Detail

getDegree

public int getDegree()

Gets the number of degrees of freedom of the distribution

Returns:

number of degrees of freedom

setDegree

public void setDegree(int value)

Sets the number of degrees of freedom of the distribution

Parameters:

value - number of degrees of freedom (positive)

computeProbability

public double computeProbability(double value)

Computes mass probability at a given point of the chi-square distribution.

Specified by:

computeProbability in interface Distribution

Parameters:

value - point selected

Returns:

mass probability at 'value'

computeCumulativeProbability

public double computeCumulativeProbability(double value)

Computes cumulative probability at a given point of the chi-square distribution.

Specified by:

computeCumulativeProbability in interface Distribution

Parameters:

value - point selected

Returns:

cumulative probability at 'value'

computeRightTailProbability

public double computeRightTailProbability(double value)

Computes the right tail of chi-square distribution

Parameters:

value - point selected

Returns:

The Chi Square right tail value

toString

public java.lang.String toString()

To String method.

Overrides:

toString in class java.lang.Object

Returns:

string representation of the distribution