de.unihalle.informatik.MiToBo.math.distributions.impl

Class ExponentialDistribution

java.lang.Object

de.unihalle.informatik.MiToBo.math.distributions.impl.ExponentialDistribution

All Implemented Interfaces:

FirstOrderMoment<Double>, IntegrableDistribution<Double>, SecondOrderCentralMoment<Double>

public class ExponentialDistribution
extends Object
implements IntegrableDistribution<Double>, FirstOrderMoment<Double>, SecondOrderCentralMoment<Double>

Exponential distribution.

Author:

Oliver Gress

Field Summary

Fields

Modifier and Type	Field and Description
protected double	lambda

Constructor Summary

Constructors

Constructor and Description
ExponentialDistribution(double lambda) Constructor for exponential distribution lambda*exp(-lambda*x) if x >= 0.

Method Summary

Modifier and Type	Method and Description
Double	getCovariance()
double	getLambda()
Double	getMean()
double	P(Double x) Evaluate probability distribution function P(X <= x)
void	setLambda(double lambda)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

lambda

protected double lambda

Constructor Detail

ExponentialDistribution

public ExponentialDistribution(double lambda)

Constructor for exponential distribution lambda*exp(-lambda*x) if x >= 0.

Parameters:

lambda -

Method Detail

P

public double P(Double x)

Description copied from interface: IntegrableDistribution

Evaluate probability distribution function P(X <= x)

Specified by:

P in interface IntegrableDistribution<Double>

Parameters:

x - realization of random variable X

Returns:

value of P(X <= x)

getMean

public Double getMean()

Specified by:

getMean in interface FirstOrderMoment<Double>

getCovariance

public Double getCovariance()

Specified by:

getCovariance in interface SecondOrderCentralMoment<Double>

setLambda

public void setLambda(double lambda)

getLambda

public double getLambda()