template<class Function>
class ROOT::Minuit2::FumiliFCNAdapter< Function >

template wrapped class for adapting to FumiliFCNBase signature

Author: Lorenzo Moneta

Definition at line 41 of file FumiliFCNAdapter.h.

Public Types
typedef Function::Type_t	Type_t

Public Member Functions
	FumiliFCNAdapter (const Function &f, unsigned int ndim, double up=1.)

	~FumiliFCNAdapter ()

void	EvaluateAll (const std::vector< double > &v)
	evaluate gradient hessian and function value needed by fumili More...

double	operator() (const double *v) const

double	operator() (const std::vector< double > &v) const
	The meaning of the vector of parameters is of course defined by the user, who uses the values of those parameters to calculate their function Value. More...

void	SetErrorDef (double up)
	add interface to set dynamically a new error definition Re-implement this function if needed. More...

double	Up () const
	Error definition of the function. More...

Public Member Functions inherited from ROOT::Minuit2::FumiliFCNBase
	FumiliFCNBase ()
	Default Constructor. More...

	FumiliFCNBase (unsigned int npar)
	Constructor which initializes the class with the function provided by the user for modeling the data. More...

virtual	~FumiliFCNBase ()

virtual unsigned int	Dimension ()
	return number of function variable (parameters) , i.e. More...

virtual void	EvaluateAll (const std::vector< double > &par)=0
	Evaluate function Value, Gradient and Hessian using Fumili approximation, for values of parameters p The resul is cached inside and is return from the FumiliFCNBase::Value , FumiliFCNBase::Gradient and FumiliFCNBase::Hessian methods. More...

virtual const std::vector< double > &	Gradient () const
	Return cached Value of function Gradient estimated previously using the FumiliFCNBase::EvaluateAll method. More...

virtual double	Hessian (unsigned int row, unsigned int col) const
	Return Value of the i-th j-th element of the Hessian matrix estimated previously using the FumiliFCNBase::EvaluateAll method. More...

virtual double	Value () const
	Return cached Value of objective function estimated previously using the FumiliFCNBase::EvaluateAll method. More...

Public Member Functions inherited from ROOT::Minuit2::FCNBase
virtual	~FCNBase ()

virtual double	ErrorDef () const
	Error definition of the function. More...

virtual double	operator() (const std::vector< double > &x) const =0
	The meaning of the vector of parameters is of course defined by the user, who uses the values of those parameters to calculate their function Value. More...

virtual void	SetErrorDef (double)
	add interface to set dynamically a new error definition Re-implement this function if needed. More...

virtual double	Up () const =0
	Error definition of the function. More...

Public Member Functions inherited from ROOT::Minuit2::GenericFunction
virtual	~GenericFunction ()

virtual double	operator() (const std::vector< double > &x) const =0
	Evaluates the function using the vector containing the input values. More...

Private Attributes
const Function &	fFunc

double	fUp

Additional Inherited Members
Protected Member Functions inherited from ROOT::Minuit2::FumiliFCNBase
std::vector< double > &	Gradient ()

std::vector< double > &	Hessian ()

virtual void	InitAndReset (unsigned int npar)
	initialize and reset values of gradien and Hessian More...

void	SetFCNValue (double value)

#include <Minuit2/FumiliFCNAdapter.h>

Inheritance diagram for ROOT::Minuit2::FumiliFCNAdapter< Function >:

[legend]

Member Typedef Documentation

◆ Type_t

template<class Function >

typedef Function::Type_t ROOT::Minuit2::FumiliFCNAdapter< Function >::Type_t

Definition at line 46 of file FumiliFCNAdapter.h.

Constructor & Destructor Documentation

◆ FumiliFCNAdapter()

template<class Function >

ROOT::Minuit2::FumiliFCNAdapter< Function >::FumiliFCNAdapter	(	const Function &	f,
		unsigned int	ndim,
		double	up = `1.`
	)

inline

Definition at line 48 of file FumiliFCNAdapter.h.

◆ ~FumiliFCNAdapter()

template<class Function >

ROOT::Minuit2::FumiliFCNAdapter< Function >::~FumiliFCNAdapter ( )

inline

Definition at line 54 of file FumiliFCNAdapter.h.

Member Function Documentation

◆ EvaluateAll()

template<class Function >

void ROOT::Minuit2::FumiliFCNAdapter< Function >::EvaluateAll ( const std::vector< double > & v )

virtual

evaluate gradient hessian and function value needed by fumili

Implements ROOT::Minuit2::FumiliFCNBase.

Definition at line 89 of file FumiliFCNAdapter.h.

◆ operator()() [1/2]

template<class Function >

double ROOT::Minuit2::FumiliFCNAdapter< Function >::operator() ( const double * v ) const

inline

Definition at line 60 of file FumiliFCNAdapter.h.

◆ operator()() [2/2]

template<class Function >

double ROOT::Minuit2::FumiliFCNAdapter< Function >::operator() ( const std::vector< double > & x ) const

inlinevirtual

The meaning of the vector of parameters is of course defined by the user, who uses the values of those parameters to calculate their function Value.

The order and the position of these parameters is strictly the one specified by the user when supplying the starting values for minimization. The starting values must be specified by the user, either via an std::vector<double> or the MnUserParameters supplied as input to the MINUIT minimizers such as VariableMetricMinimizer or MnMigrad. Later values are determined by MINUIT as it searches for the Minimum or performs whatever analysis is requested by the user.

Parameters

par	function parameters as defined by the user.

Returns: the Value of the function.

See also: MnUserParameters; VariableMetricMinimizer; MnMigrad

Implements ROOT::Minuit2::FCNBase.

Definition at line 57 of file FumiliFCNAdapter.h.

◆ SetErrorDef()

template<class Function >

void ROOT::Minuit2::FumiliFCNAdapter< Function >::SetErrorDef ( double )

inlinevirtual

add interface to set dynamically a new error definition Re-implement this function if needed.

Reimplemented from ROOT::Minuit2::FCNBase.

Definition at line 65 of file FumiliFCNAdapter.h.

◆ Up()

template<class Function >

double ROOT::Minuit2::FumiliFCNAdapter< Function >::Up ( ) const

inlinevirtual

Error definition of the function.

MINUIT defines Parameter errors as the change in Parameter Value required to change the function Value by up. Normally, for chisquared fits it is 1, and for negative log likelihood, its Value is 0.5. If the user wants instead the 2-sigma errors for chisquared fits, it becomes 4, as Chi2(x+n*sigma) = Chi2(x) + n*n.

Implements ROOT::Minuit2::FCNBase.

Definition at line 63 of file FumiliFCNAdapter.h.

Member Data Documentation

◆ fFunc

template<class Function >

const Function& ROOT::Minuit2::FumiliFCNAdapter< Function >::fFunc

private

Definition at line 83 of file FumiliFCNAdapter.h.

◆ fUp

template<class Function >

double ROOT::Minuit2::FumiliFCNAdapter< Function >::fUp

private

Definition at line 84 of file FumiliFCNAdapter.h.

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

math/minuit2/inc/Minuit2/FumiliFCNAdapter.h

Public Types

Public Member Functions

Private Attributes

Additional Inherited Members

Member Typedef Documentation

◆ Type_t

Constructor & Destructor Documentation

◆ FumiliFCNAdapter()

◆ ~FumiliFCNAdapter()

Member Function Documentation

◆ EvaluateAll()

◆ operator()() [1/2]

◆ operator()() [2/2]

◆ SetErrorDef()

◆ Up()

Member Data Documentation

◆ fFunc

◆ fUp