| java.lang.Object
 org.apache.commons.math.distribution.DistributionFactory
org.apache.commons.math.distribution.DistributionFactoryImpl
| DistributionFactoryImpl | | public class DistributionFactoryImpl extends DistributionFactory (Code) | | A concrete distribution factory. This is the default factory used by
Commons-Math.
version:
$Revision: 201915 $ $Date: 2005-06-26 15:20:57 -0700 (Sun, 26 Jun 2005) $ |
| DistributionFactoryImpl | | public DistributionFactoryImpl()(Code) | | Default constructor. Package scope to prevent unwanted instantiation.
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| createBinomialDistribution | | public BinomialDistribution createBinomialDistribution(int numberOfTrials, double probabilityOfSuccess)(Code) | | Create a binomial distribution with the given number of trials and
probability of success.
Parameters:
numberOfTrials - the number of trials
Parameters:
probabilityOfSuccess - the probability of success a new binomial distribution |
| createChiSquareDistribution | | public ChiSquaredDistribution createChiSquareDistribution(double degreesOfFreedom)(Code) | | Create a new chi-square distribution with the given degrees of freedom.
Parameters:
degreesOfFreedom - degrees of freedom a new chi-square distribution |
| createExponentialDistribution | | public ExponentialDistribution createExponentialDistribution(double mean)(Code) | | Create a new exponential distribution with the given degrees of freedom.
Parameters:
mean - mean a new exponential distribution |
| createFDistribution | | public FDistribution createFDistribution(double numeratorDegreesOfFreedom, double denominatorDegreesOfFreedom)(Code) | | Create a new F-distribution with the given degrees of freedom.
Parameters:
numeratorDegreesOfFreedom - numerator degrees of freedom
Parameters:
denominatorDegreesOfFreedom - denominator degrees of freedom a new F-distribution |
| createGammaDistribution | | public GammaDistribution createGammaDistribution(double alpha, double beta)(Code) | | Create a new gamma distribution the given shape and scale parameters.
Parameters:
alpha - the shape parameter
Parameters:
beta - the scale parameter a new gamma distribution |
| createHypergeometricDistribution | | public HypergeometricDistribution createHypergeometricDistribution(int populationSize, int numberOfSuccesses, int sampleSize)(Code) | | Create a new hypergeometric distribution with the given the population
size, the number of successes in the population, and the sample size.
Parameters:
populationSize - the population size
Parameters:
numberOfSuccesses - number of successes in the population
Parameters:
sampleSize - the sample size a new hypergeometric desitribution |
| createNormalDistribution | | public NormalDistribution createNormalDistribution(double mean, double sd)(Code) | | Create a new normal distribution with the given mean and standard
deviation.
Parameters:
mean - the mean of the distribution
Parameters:
sd - standard deviation a new normal distribution |
| createNormalDistribution | | public NormalDistribution createNormalDistribution()(Code) | | Create a new normal distribution with the mean zero and standard
deviation one.
a new normal distribution |
| createPoissonDistribution | | public PoissonDistribution createPoissonDistribution(double lambda)(Code) | | Create a new Poisson distribution with poisson parameter lambda.
lambda must be postive; otherwise an
IllegalArgumentException is thrown.
Parameters:
lambda - poisson parameter a new Poisson distribution
throws:
IllegalArgumentException - if lambda ≤ 0 |
| createTDistribution | | public TDistribution createTDistribution(double degreesOfFreedom)(Code) | | Create a new t distribution with the given degrees of freedom.
Parameters:
degreesOfFreedom - degrees of freedom a new t distribution. |
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