org.statcato.statistics

Class ExponentialProbabilityDistribution

java.lang.Object

org.statcato.statistics.ProbabilityDistribution

org.statcato.statistics.ExponentialProbabilityDistribution

public class ExponentialProbabilityDistribution
extends ProbabilityDistribution

Exponential probability distribution class. A continuous probability distribution defined by the exponential function.

Since:

1.0

Constructor Summary

Constructors

Constructor and Description
ExponentialProbabilityDistribution(double lambda) Constructor, given the rate parameter.

Method Summary

Modifier and Type	Method and Description
double	cumulativeProbability(double x) Returns the cumulative probabililty up to x.
double	density(double x) Returns the density of the distribution at x.
double	inverseCumulativeProbability(double area) Returns the inverse cumulative probability.

Methods inherited from class org.statcato.statistics.ProbabilityDistribution

inverseCumulativeProbability

Methods inherited from class java.lang.Object

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

Constructor Detail

ExponentialProbabilityDistribution

public ExponentialProbabilityDistribution(double lambda)

Constructor, given the rate parameter.

Parameters:

rate - parameter

Method Detail

density

public double density(double x)

Returns the density of the distribution at x.

Specified by:

density in class ProbabilityDistribution

Parameters:

x -

Returns:

probability density at x

cumulativeProbability

public double cumulativeProbability(double x)

Returns the cumulative probabililty up to x.

Specified by:

cumulativeProbability in class ProbabilityDistribution

Parameters:

x -

Returns:

cumulative probability P(<=x)

inverseCumulativeProbability

public double inverseCumulativeProbability(double area)

Returns the inverse cumulative probability.

Parameters:

area - cumulative probability

Returns:

inverse cumulative probability