nl.tudelft.simulation.jstats.distributions
Class DistExponential

java.lang.Object
  nl.tudelft.simulation.jstats.distributions.Dist
      nl.tudelft.simulation.jstats.distributions.DistContinuous
          nl.tudelft.simulation.jstats.distributions.DistExponential

All Implemented Interfaces:

java.io.Serializable

public class DistExponential

extends DistContinuous

The Exponential distribution. For more information on this distribution see http://mathworld.wolfram.com/ExponentialDistribution.html

(c) copyright 2002-2004 Delft University of Technology , the Netherlands.
See for project information www.simulation.tudelft.nl
License of use: General Public License (GPL) , no warranty

Since:

1.2

Version:

1.10 2004-03-22

Author:

Alexander Verbraeck
Peter Jacobs

See Also:

Serialized Form

Field Summary

Fields inherited from class nl.tudelft.simulation.jstats.distributions.Dist

stream

Constructor Summary

DistExponential(StreamInterface stream, double mean)
constructs a new exponential function.

Method Summary

double	draw() draws the next stream value according to the probability of this this distribution.
double	probDensity(double observation) returns the propbability density value of an observation
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DistExponential

public DistExponential(StreamInterface stream,
                       double mean)

constructs a new exponential function. The exponential distribution describes the interarrival times of "cutomers" to a system that occur at a constant rate.

Parameters:

stream - the numberstream

mean - the mean (mean>0)

Method Detail

draw

public double draw()

Description copied from class: DistContinuous

draws the next stream value according to the probability of this this distribution.

Specified by:

draw in class DistContinuous

Returns:

the next double value drawn.

See Also:

DistContinuous.draw()

probDensity

public double probDensity(double observation)

Description copied from class: DistContinuous

returns the propbability density value of an observation

Specified by:

probDensity in class DistContinuous

Parameters:

observation - the observation.

Returns:

double the probability density.

See Also:

#probDensity(double)

toString

public java.lang.String toString()

See Also:

Object.toString()