Class Binomial

java.lang.Object

random.AbstractDistribution

random.discrete.DiscreteDistribution

random.discrete.Binomial

All Implemented Interfaces:

StorableDistribution

public class Binomial
extends DiscreteDistribution

Binomial distribution: number of successes in n independent trials, each with probability p.

Field Summary

Fields inherited from class DiscreteDistribution

cached, CDFList, CDFListCalculated

Fields inherited from class AbstractDistribution

engine

Constructor Summary

Constructors

Constructor	Description
Binomial()
Binomial(double p, int n)
Binomial(Double p, Integer numberOfItems)
Binomial(Integer numberOfItems, Double p)

Method Summary

Modifier and Type	Method	Description
double	cdf(int x)
double	cdf(int x, Parameter par)	obtain the cumulative distribution from the distribution
int	getlower()
int	getUpper()
int	nextRand()	These functions are used to direct initialize the Discrete Distribution.
int	nextRand(Parameter par)	Generate random variables that follow an probability distribution
double	pmf(int x)
double	pmf(int x, Parameter par)	obtain the probability distribution from the distribution
double	theorMean()
double	theorMean(Parameter par)	Calculate the Mean value from the parameter of the distribution
double	theorVariance()
double	theorVariance(Parameter par)	Calculate the Variance from the parameter of the distribution
boolean	updatePar(double p, int n)
boolean	updatePar(Parameter p)	Sub-class must implement this method to update parameter.

Methods inherited from class DiscreteDistribution

binarySearch, createdCDFList, createdCDFList, inverseTransformSampling, outdated

Methods inherited from class AbstractDistribution

setRandomEngine

Methods inherited from class Object

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

Constructor Details

Binomial

public Binomial()

Binomial

public Binomial(double p,
 int n)
         throws IncorrectDistributionParameterException

Throws:

IncorrectDistributionParameterException

Binomial

public Binomial(Double p,
 Integer numberOfItems)
         throws IncorrectDistributionParameterException

Throws:

IncorrectDistributionParameterException

Binomial

public Binomial(Integer numberOfItems,
 Double p)
         throws IncorrectDistributionParameterException

Throws:

IncorrectDistributionParameterException

Method Details

updatePar

public boolean updatePar(double p,
 int n)
                  throws IncorrectDistributionParameterException

Throws:

IncorrectDistributionParameterException

updatePar

public boolean updatePar(Parameter p)
                  throws IncorrectDistributionParameterException

Description copied from class: DiscreteDistribution

Sub-class must implement this method to update parameter.

Specified by:

updatePar in class DiscreteDistribution

Throws:

IncorrectDistributionParameterException

getUpper

public int getUpper()

Specified by:

getUpper in class DiscreteDistribution

getlower

public int getlower()

Specified by:

getlower in class DiscreteDistribution

nextRand

public int nextRand()

Description copied from class: DiscreteDistribution

These functions are used to direct initialize the Discrete Distribution. once invoke parameter constructor with the distribution parameter, set cached = true. if not cache the parameter, only method with `Parameter` are available.

Specified by:

nextRand in class DiscreteDistribution

pmf

public double pmf(int x)

Specified by:

pmf in class DiscreteDistribution

cdf

public double cdf(int x)

Specified by:

cdf in class DiscreteDistribution

theorMean

public double theorMean()

Specified by:

theorMean in class DiscreteDistribution

theorVariance

public double theorVariance()

Specified by:

theorVariance in class DiscreteDistribution

nextRand

public int nextRand(Parameter par)
             throws IncorrectDistributionParameterException

Description copied from class: DiscreteDistribution

Generate random variables that follow an probability distribution

Specified by:

nextRand in class DiscreteDistribution

Parameters:

par - parameter of the distribution.

Returns:

int - random variables that follow an probability distribution

Throws:

IncorrectDistributionParameterException

pmf

public double pmf(int x,
 Parameter par)
           throws IncorrectDistributionParameterException

Description copied from class: DiscreteDistribution

obtain the probability distribution from the distribution

Specified by:

pmf in class DiscreteDistribution

Parameters:

x - int - random variable indicating where to evaluate the pmf.

par - parameter of the distribution.

Returns:

double - the probability weight evaluated at x.

Throws:

IncorrectDistributionParameterException

cdf

public double cdf(int x,
 Parameter par)
           throws IncorrectDistributionParameterException

Description copied from class: DiscreteDistribution

obtain the cumulative distribution from the distribution

Specified by:

cdf in class DiscreteDistribution

Parameters:

x - int - random variable indicating where to evaluate the cdf.

par - parameter of the distribution.

Returns:

double - the probability weight cumulated at x.

Throws:

IncorrectDistributionParameterException

theorMean

public double theorMean(Parameter par)
                 throws IncorrectDistributionParameterException

Description copied from class: DiscreteDistribution

Calculate the Mean value from the parameter of the distribution

Specified by:

theorMean in class DiscreteDistribution

Parameters:

par - parameter of the distribution.

Returns:

double - theoretic mean value of the distribution.

Throws:

IncorrectDistributionParameterException

theorVariance

public double theorVariance(Parameter par)
                     throws IncorrectDistributionParameterException

Description copied from class: DiscreteDistribution

Calculate the Variance from the parameter of the distribution

Specified by:

theorVariance in class DiscreteDistribution

Parameters:

par - parameter of the distribution.

Returns:

double - theoretic variance value of the distribution.

Throws:

IncorrectDistributionParameterException