javanpst.distributions.common.continuous

Class ExponentialDistribution

java.lang.Object

javanpst.distributions.common.continuous.ExponentialDistribution

All Implemented Interfaces:

Distribution

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

A exponential distribution.

Constructor Summary

Constructors

Constructor and Description
ExponentialDistribution() Default builder.
ExponentialDistribution(double lambda) Builder.
ExponentialDistribution(ExponentialDistribution old) Copy constructor Creates a copy of a given exponential distribution

Method Summary

Modifier and Type	Method and Description
double	computeCumulativeProbability(double x) Computes cumulative probability at a given point of the exponential distribution.
double	computeProbability(double x) Computes mass probability at a given point of the exponential distribution.
double	getLambda() Gets lambda parameter
double	getMean() Gets mean of the distribution (mean = 1/lambda)
void	setLambda(double value) Sets lambda parameter
void	setMean(double value) Sets mean of the distribution (mean = 1/lambda)
java.lang.String	toString() To String method.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExponentialDistribution

public ExponentialDistribution()

Default builder. Creates a exponential distribution with lambda = 1

ExponentialDistribution

public ExponentialDistribution(double lambda)

Builder. Creates a exponential distribution with specified lambda

Parameters:

lambda - lambda parameer of the distribution

ExponentialDistribution

public ExponentialDistribution(ExponentialDistribution old)

Copy constructor Creates a copy of a given exponential distribution

Parameters:

old - exponential distribution to copy

Method Detail

setLambda

public void setLambda(double value)

Sets lambda parameter

Parameters:

value - value for the lambda parameter

setMean

public void setMean(double value)

Sets mean of the distribution (mean = 1/lambda)

Parameters:

value - value for the mean

getMean

public double getMean()

Gets mean of the distribution (mean = 1/lambda)

Returns:

mean of the distribution

getLambda

public double getLambda()

Gets lambda parameter

Returns:

lambda value

computeProbability

public double computeProbability(double x)

Computes mass probability at a given point of the exponential distribution.

Specified by:

computeProbability in interface Distribution

Parameters:

x - point selected

Returns:

mass probability at 'x'

computeCumulativeProbability

public double computeCumulativeProbability(double x)

Computes cumulative probability at a given point of the exponential distribution.

Specified by:

computeCumulativeProbability in interface Distribution

Parameters:

x - point selected

Returns:

cumulative probability at 'x'

toString

public java.lang.String toString()

To String method.

Overrides:

toString in class java.lang.Object

Returns:

string representation of the distribution