    All Packages  Class Hierarchy  This Package  Previous  Next  Index

# Class JSci.maths.statistics.BetaDistribution

    java.lang.Object
       |
       +----JSci.maths.statistics.ProbabilityDistribution
               |
               +----JSci.maths.statistics.BetaDistribution

public final class BetaDistribution
extends ProbabilityDistribution

The BetaDistribution class provides an object for encapsulating beta distributions.

##

BetaDistribution(double, double)
  Constructs a beta distribution.

##

cumulative(double)
  Cumulative beta distribution function.
getDegreesOfFreedomP()
  Returns the degrees of freedom p.
getDegreesOfFreedomQ()
  Returns the degrees of freedom q.
inverse(double)
  Inverse of the cumulative beta distribution function.
probability(double)
  Probability density function of a beta distribution.

##

BetaDistribution

     public BetaDistribution(double dgrP,
                             double dgrQ)

  Constructs a beta distribution.

  Parameters:
    dgrP - degrees of freedom p
    dgrQ - degrees of freedom q

##

getDegreesOfFreedomP

     public double getDegreesOfFreedomP()

  Returns the degrees of freedom p.

getDegreesOfFreedomQ

     public double getDegreesOfFreedomQ()

  Returns the degrees of freedom q.

probability

     public double probability(double X)

  Probability density function of a beta distribution.

  Returns:
    the probability that a stochastic variable x has the value X, i.e. P(x=X)
  Overrides:
    probability in class ProbabilityDistribution

cumulative

     public double cumulative(double X)

  Cumulative beta distribution function.

  Returns:
    the probability that a stochastic variable x is less then X, i.e. P(x<X)
  Overrides:
    cumulative in class ProbabilityDistribution

inverse

     public double inverse(double probability)

  Inverse of the cumulative beta distribution function.

  Returns:
    the value X for which P(x<X)
  Overrides:
    inverse in class ProbabilityDistribution

    All Packages  Class Hierarchy  This Package  Previous  Next  Index