ROOT::Math::BasicFitMethodFunction< FunctionType > Class Template Reference

template<class FunctionType>
class ROOT::Math::BasicFitMethodFunction< FunctionType >

FitMethodFunction class Interface for objective functions (like chi2 and likelihood used in the fit) In addition to normal function interface provide interface for calculating each data contrinution to the function which is required by some algorithm (like Fumili)

Definition at line 40 of file Fitter.h.

Public Types
typedef FunctionType::BaseFunc	BaseFunction
enum	Type_t { kUndefined, kLeastSquare, kLogLikelihood }
	enumeration specyfing the possible fit method types More...

Public Member Functions
	BasicFitMethodFunction (int dim, int npoint)
virtual	~BasicFitMethodFunction ()
	Virtual Destructor (no operations) More...
virtual double	DataElement (const double *x, unsigned int i, double *g=0) const =0
	method returning the data i-th contribution to the fit objective function For example the residual for the least square functions or the pdf element for the likelihood functions. More...
virtual unsigned int	NCalls () const
	return the total number of function calls (overrided if needed) More...
virtual unsigned int	NDim () const
	Number of dimension (parameters) . More...
virtual unsigned int	NPoints () const
	return the number of data points used in evaluating the function More...
virtual void	ResetNCalls ()
	reset number of function calls More...
virtual Type_t	Type () const
	return the type of method, override if needed More...
virtual void	UpdateNCalls () const
	update number of calls More...

Private Attributes
unsigned int	fNCalls
unsigned int	fNDim
unsigned int	fNPoints

#include <Fit/Fitter.h>

Inheritance diagram for ROOT::Math::BasicFitMethodFunction< FunctionType >:

Member Typedef Documentation

BaseFunction

template<class FunctionType>

typedef FunctionType::BaseFunc ROOT::Math::BasicFitMethodFunction< FunctionType >::BaseFunction

Definition at line 41 of file FitMethodFunction.h.

Member Enumeration Documentation

Type_t

template<class FunctionType>

enum ROOT::Math::BasicFitMethodFunction::Type_t

enumeration specyfing the possible fit method types

Enumerator
kUndefined
kLeastSquare
kLogLikelihood

Definition at line 44 of file FitMethodFunction.h.

Constructor & Destructor Documentation

BasicFitMethodFunction()

template<class FunctionType>

ROOT::Math::BasicFitMethodFunction< FunctionType >::BasicFitMethodFunction ( int  dim, int  npoint  )

inline

Definition at line 47 of file FitMethodFunction.h.

~BasicFitMethodFunction()

template<class FunctionType>

virtual ROOT::Math::BasicFitMethodFunction< FunctionType >::~BasicFitMethodFunction ( )

inlinevirtual

Virtual Destructor (no operations)

Definition at line 56 of file FitMethodFunction.h.

Member Function Documentation

DataElement()

template<class FunctionType>

virtual double ROOT::Math::BasicFitMethodFunction< FunctionType >::DataElement ( const double *  x, unsigned int  i, double *  g = 0  ) const

pure virtual

method returning the data i-th contribution to the fit objective function For example the residual for the least square functions or the pdf element for the likelihood functions.

Estimating eventually also the gradient of the data element if the passed pointer is not null

Implemented in ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >, ROOT::Fit::Chi2FCN< DerivFunType, ModelFunType >, and ROOT::Fit::LogLikelihoodFCN< DerivFunType, ModelFunType >.

NCalls()

template<class FunctionType>

virtual unsigned int ROOT::Math::BasicFitMethodFunction< FunctionType >::NCalls ( ) const

inlinevirtual

return the total number of function calls (overrided if needed)

Definition at line 85 of file FitMethodFunction.h.

NDim()

template<class FunctionType>

virtual unsigned int ROOT::Math::BasicFitMethodFunction< FunctionType >::NDim ( ) const

inlinevirtual

Number of dimension (parameters) .

From IGenMultiFunction interface

Definition at line 61 of file FitMethodFunction.h.

NPoints()

template<class FunctionType>

virtual unsigned int ROOT::Math::BasicFitMethodFunction< FunctionType >::NPoints ( ) const

inlinevirtual

return the number of data points used in evaluating the function

Definition at line 75 of file FitMethodFunction.h.

ResetNCalls()

template<class FunctionType>

virtual void ROOT::Math::BasicFitMethodFunction< FunctionType >::ResetNCalls ( )

inlinevirtual

reset number of function calls

Definition at line 95 of file FitMethodFunction.h.

Type()

template<class FunctionType>

virtual Type_t ROOT::Math::BasicFitMethodFunction< FunctionType >::Type ( ) const

inlinevirtual

return the type of method, override if needed

Reimplemented in ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >, ROOT::Fit::Chi2FCN< DerivFunType, ModelFunType >, and ROOT::Fit::LogLikelihoodFCN< DerivFunType, ModelFunType >.

Definition at line 80 of file FitMethodFunction.h.

UpdateNCalls()

template<class FunctionType>

virtual void ROOT::Math::BasicFitMethodFunction< FunctionType >::UpdateNCalls ( ) const

inlinevirtual

update number of calls

Definition at line 90 of file FitMethodFunction.h.

Member Data Documentation

fNCalls

template<class FunctionType>

unsigned int ROOT::Math::BasicFitMethodFunction< FunctionType >::fNCalls

mutableprivate

Definition at line 109 of file FitMethodFunction.h.

fNDim

template<class FunctionType>

unsigned int ROOT::Math::BasicFitMethodFunction< FunctionType >::fNDim

private

Definition at line 107 of file FitMethodFunction.h.

fNPoints

template<class FunctionType>

unsigned int ROOT::Math::BasicFitMethodFunction< FunctionType >::fNPoints

private

Definition at line 108 of file FitMethodFunction.h.

Libraries for ROOT::Math::BasicFitMethodFunction< FunctionType >:

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

• math/mathcore/inc/Fit/Fitter.h
• math/mathcore/inc/Math/FitMethodFunction.h