itk::Statistics::AsymmetricVariateGenerator Class Reference
[Statistics]

Asymmetric variate generator. More...

#include <freAsymmetricVariateGenerator.h>

List of all members.

Public Types
typedef AsymmetricVariateGenerator	Self
typedef RandomVariateGeneratorBase	Superclass
typedef SmartPointer < Self >	Pointer
typedef SmartPointer < const Self >	ConstPointer
Public Member Functions
virtual const char *	GetNameOfClass () const
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
void	Initialize (const int randomSeed)
void	Initialize ()
virtual double	GetVariate ()
double	operator() ()
virtual void	SetVariance (const double _arg)
virtual double	GetVariance ()
virtual void	SetSkewness (const double _arg)
virtual double	GetSkewness ()
virtual void	SetGamma (const double _arg)
virtual double	GetGamma ()
Static Public Member Functions
static Pointer	New (void)
Protected Member Functions
	AsymmetricVariateGenerator ()
virtual	~AsymmetricVariateGenerator ()
virtual void	PrintSelf (std::ostream &os, Indent indent) const
double	Erf (double x)
double	Freq (double x)
double	INorm (double z)
Protected Attributes
double	m_Variance
double	m_Skewness
double	m_Gamma

---

Detailed Description

Asymmetric variate generator.

Asymmetric random number generator based on the work of Lars Hildebrand.

The Asymmetric variate generator is an algorithm for generating random numbers with a nonsymmetric distribution. It is e.g. used for asymetric evolution strategies.
The parameter variance controls the variance of the distribution, parameter skewness the skewness. Gamma is a global control parameter for the distribution shape. Gamma == 2 and skewness = 0 is equal to a normal distribution with mean 0. For more information see reference.

Reference L. Hildebrand, Asymmetrische Evolutionsstrategien, Information Technology 46 (2004): 353-355.

Definition at line 46 of file freAsymmetricVariateGenerator.h.

---

Member Typedef Documentation

typedef AsymmetricVariateGenerator itk::Statistics::AsymmetricVariateGenerator::Self

Standard class typedefs.

Definition at line 52 of file freAsymmetricVariateGenerator.h.

typedef RandomVariateGeneratorBase itk::Statistics::AsymmetricVariateGenerator::Superclass

Definition at line 53 of file freAsymmetricVariateGenerator.h.

typedef SmartPointer<Self> itk::Statistics::AsymmetricVariateGenerator::Pointer

Definition at line 54 of file freAsymmetricVariateGenerator.h.

typedef SmartPointer<const Self> itk::Statistics::AsymmetricVariateGenerator::ConstPointer

Definition at line 55 of file freAsymmetricVariateGenerator.h.

---

Constructor & Destructor Documentation

itk::Statistics::AsymmetricVariateGenerator::AsymmetricVariateGenerator

(

)

[protected]

Definition at line 40 of file freAsymmetricVariateGenerator.cxx.

References Initialize().

Here is the call graph for this function:

virtual itk::Statistics::AsymmetricVariateGenerator::~AsymmetricVariateGenerator

(

)

[inline, protected, virtual]

Definition at line 89 of file freAsymmetricVariateGenerator.h.

---

Member Function Documentation

virtual const char* itk::Statistics::AsymmetricVariateGenerator::GetNameOfClass

(

)

const [inline, virtual]

Run-time type information (and related methods).

Definition at line 59 of file freAsymmetricVariateGenerator.h.

static Pointer itk::Statistics::AsymmetricVariateGenerator::New

(

void

)

[inline, static]

Method for creation through the object factory.

Definition at line 62 of file freAsymmetricVariateGenerator.h.

virtual ::itk::LightObject::Pointer itk::Statistics::AsymmetricVariateGenerator::CreateAnother

(

void

)

const [inline, virtual]

Definition at line 62 of file freAsymmetricVariateGenerator.h.

void itk::Statistics::AsymmetricVariateGenerator::Initialize

(

const int

randomSeed

)

initialize with a simple IntegerType

Definition at line 47 of file freAsymmetricVariateGenerator.cxx.

void itk::Statistics::AsymmetricVariateGenerator::Initialize

(

)

Definition at line 54 of file freAsymmetricVariateGenerator.cxx.

Referenced by AsymmetricVariateGenerator().

double itk::Statistics::AsymmetricVariateGenerator::GetVariate

(

)

[virtual]

get assymetric variate

Definition at line 61 of file freAsymmetricVariateGenerator.cxx.

References Erf(), m_Gamma, m_Skewness, and m_Variance.

Referenced by operator()().

Here is the call graph for this function:

double itk::Statistics::AsymmetricVariateGenerator::operator()

(

)

Same as GetVariate()

Definition at line 85 of file freAsymmetricVariateGenerator.cxx.

References GetVariate().

Here is the call graph for this function:

virtual void itk::Statistics::AsymmetricVariateGenerator::SetVariance

(

const double

_arg

)

[inline, virtual]

Definition at line 78 of file freAsymmetricVariateGenerator.h.

virtual double itk::Statistics::AsymmetricVariateGenerator::GetVariance

(

)

[inline, virtual]

Definition at line 79 of file freAsymmetricVariateGenerator.h.

virtual void itk::Statistics::AsymmetricVariateGenerator::SetSkewness

(

const double

_arg

)

[inline, virtual]

Definition at line 81 of file freAsymmetricVariateGenerator.h.

virtual double itk::Statistics::AsymmetricVariateGenerator::GetSkewness

(

)

[inline, virtual]

Definition at line 82 of file freAsymmetricVariateGenerator.h.

virtual void itk::Statistics::AsymmetricVariateGenerator::SetGamma

(

const double

_arg

)

[inline, virtual]

Definition at line 84 of file freAsymmetricVariateGenerator.h.

virtual double itk::Statistics::AsymmetricVariateGenerator::GetGamma

(

)

[inline, virtual]

Definition at line 85 of file freAsymmetricVariateGenerator.h.

void itk::Statistics::AsymmetricVariateGenerator::PrintSelf	(	std::ostream &	os,
		Indent	indent
	)			const [protected, virtual]

Definition at line 29 of file freAsymmetricVariateGenerator.cxx.

References m_Gamma, m_Skewness, and m_Variance.

double itk::Statistics::AsymmetricVariateGenerator::Erf

(

double

x

)

[protected]

Approximiation of the inverse error function

Definition at line 92 of file freAsymmetricVariateGenerator.cxx.

References INorm().

Referenced by GetVariate().

Here is the call graph for this function:

double itk::Statistics::AsymmetricVariateGenerator::Freq

(

double

x

)

[protected]

Helper function for INorm

Definition at line 100 of file freAsymmetricVariateGenerator.cxx.

Referenced by INorm().

double itk::Statistics::AsymmetricVariateGenerator::INorm

(

double

z

)

[protected]

Approximiation of the inverse normal distribution

Definition at line 132 of file freAsymmetricVariateGenerator.cxx.

References Freq().

Referenced by Erf().

Here is the call graph for this function:

---

Member Data Documentation

double itk::Statistics::AsymmetricVariateGenerator::m_Variance [protected]

Definition at line 92 of file freAsymmetricVariateGenerator.h.

Referenced by GetVariate(), and PrintSelf().

double itk::Statistics::AsymmetricVariateGenerator::m_Skewness [protected]

Definition at line 93 of file freAsymmetricVariateGenerator.h.

Referenced by GetVariate(), and PrintSelf().

double itk::Statistics::AsymmetricVariateGenerator::m_Gamma [protected]

Definition at line 94 of file freAsymmetricVariateGenerator.h.

Referenced by GetVariate(), and PrintSelf().

---

The documentation for this class was generated from the following files:

• freAsymmetricVariateGenerator.h
• freAsymmetricVariateGenerator.cxx

---