C# Class NSoft.NFramework.Numerics.Distributions.Discrete.Categorical

Implements the categorical distribution. For details about this distribution, see Wikipedia - Categorical distribution. This distribution is sometimes called the Discrete distribution.

The distribution is parameterized by a vector of ratios: in other words, the parameter does not have to be normalized and sum to 1. The reason is that some vectors can't be exactly normalized to sum to 1 in floating point representation.

The distribution will use the System.Random by default. Users can set the random number generator by using the RandomSource property.

The statistics classes will check all the incoming parameters whether they are in the allowed range. This might involve heavy computation. Optionally, by setting Control.CheckDistributionParameters to false, all parameter checks can be turned off.

Inheritance: IDiscreteDistribution

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Public Methods

Method	Description
Categorical ( Histogram histogram, Func randomFactory = null ) : System
Categorical ( double p, Func randomFactory = null ) : System
CumulativeDistribution ( double x ) : double	확률 분포 계산을 위한 누적분포함수
Probability ( int k ) : double	분포의 확률
ProbabilityLn ( int k ) : double	분포의 Log 확률
Sample ( ) : int	분포의 데이타를 반환합니다.
Samples ( ) : IEnumerable	분포의 무작위 데이타를 열거합니다.
ToString ( ) : string

Private Methods

Method	Description
AssertParameters ( IEnumerable p ) : void
DoSamples ( Random rnd, double cdf ) : IEnumerable	Returns one trials from the categorical distribution.
SetParameters ( double p ) : void
UnnormalizedCdf ( double p ) : double[]	Computes the unnormalized cumulative distribution function. This method performs no parameter checking.

Method Details

Categorical() public method

public Categorical ( Histogram histogram, Func randomFactory = null ) : System
histogram	NSoft.NFramework.Numerics.Statistics.Histogram
randomFactory	Func
return	System

Categorical() public method

public Categorical ( double p, Func randomFactory = null ) : System
p	double
randomFactory	Func
return	System

CumulativeDistribution() public method

확률 분포 계산을 위한 누적분포함수

public CumulativeDistribution ( double x ) : double
x	double	The location at which to compute the cumulative distribution function.
return	double

Probability() public method

분포의 확률

public Probability ( int k ) : double
k	int
return	double

ProbabilityLn() public method

분포의 Log 확률

public ProbabilityLn ( int k ) : double
k	int
return	double

Sample() public method

분포의 데이타를 반환합니다.

public Sample ( ) : int
return	int

Samples() public method

분포의 무작위 데이타를 열거합니다.

public Samples ( ) : IEnumerable
return	IEnumerable

ToString() public method

public ToString ( ) : string
return	string