Package nl.tudelft.simulation.jstats.distributions

Class DistPoisson

java.lang.Object
nl.tudelft.simulation.jstats.distributions.Dist
nl.tudelft.simulation.jstats.distributions.DistDiscrete
nl.tudelft.simulation.jstats.distributions.DistPoisson
All Implemented Interfaces:
Serializable
public class DistPoisson extends DistDiscrete
The Poisson distribution. For more information on this distribution see https://mathworld.wolfram.com/PoissonDistribution.html

Copyright (c) 2002-2024 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See for project information https://simulation.tudelft.nl. The DSOL project is distributed under a three-clause BSD-style license, which can be found at https://https://simulation.tudelft.nl/dsol/docs/latest/license.html.

Author:
Peter Jacobs , Alexander Verbraeck
See Also:

  • Constructor Details

    • DistPoisson

      public DistPoisson(StreamInterface stream, double lambda)
      constructs a new Poisson distribution.
      Parameters:
      stream - StreamInterface; the random number stream
      lambda - double; the lambda parameter
      Throws:
      IllegalArgumentException - when lambda <= 0

  • Method Details

    • draw

      public long draw()
      draws the next long from the stream.
      Specified by:
      draw in class DistDiscrete
      Returns:
      long

    • probability

      public double probability(long observation)
      returns the probability of the observation in this particular distribution.
      Specified by:
      probability in class DistDiscrete
      Parameters:
      observation - long; the discrete observation.
      Returns:
      double the probability.

    • getLambda

      public double getLambda()
      Returns:
      lambda

    • toString

      public String toString()
      Overrides:
      toString in class Object