template<class DerivFunType, class ModelFunType = ROOT::Math::IParamMultiFunction>
class ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >

class evaluating the log likelihood for binned Poisson likelihood fits it is template to distinguish gradient and non-gradient case

Definition at line 46 of file PoissonLikelihoodFCN.h.

Public Types
typedef BasicFCN< DerivFunType, ModelFunType, BinData >	BaseFCN

typedef BaseObjFunction::BaseFunction	BaseFunction

typedef ::ROOT::Math::BasicFitMethodFunction< DerivFunType >	BaseObjFunction

typedef ::ROOT::Math::IParamMultiFunctionTempl< T >	IModelFunction

typedef ModelFunType::BackendType	T

typedef BaseObjFunction::Type_t	Type_t

Public Types inherited from ROOT::Math::BasicFitMethodFunction< DerivFunType >
typedef FunctionType::BaseFunc	BaseFunction

enum	Type_t
	enumeration specifying the possible fit method types More...

Public Member Functions
	PoissonLikelihoodFCN (const BinData &data, const IModelFunction &func, int weight=0, bool extended=true, const ::ROOT::EExecutionPolicy &executionPolicy=::ROOT::EExecutionPolicy::kSequential)
	Constructor from unbin data set and model function (pdf) managed by the users.

	PoissonLikelihoodFCN (const PoissonLikelihoodFCN &f)
	Copy constructor.

	PoissonLikelihoodFCN (const std::shared_ptr< BinData > &data, const std::shared_ptr< IModelFunction > &func, int weight=0, bool extended=true, const ::ROOT::EExecutionPolicy &executionPolicy=::ROOT::EExecutionPolicy::kSequential)
	Constructor from unbin data set and model function (pdf)

virtual	~PoissonLikelihoodFCN ()
	Destructor (no operations)

virtual BaseFunction *	Clone () const
	clone the function (need to return Base for Windows)

virtual double	DataElement (const double x, unsigned int i, double g, double *h, bool fullHessian) const
	i-th likelihood element and its gradient

virtual void	Gradient (const double x, double g) const
	evaluate gradient

bool	IsWeighted () const

virtual unsigned int	NFitPoints () const

PoissonLikelihoodFCN &	operator= (const PoissonLikelihoodFCN &rhs)
	Assignment operator.

virtual BaseObjFunction::Type_t	Type () const
	Computes the full Hessian.

void	UseSumOfWeights ()

void	UseSumOfWeightSquare (bool on=true)

Public Member Functions inherited from ROOT::Fit::BasicFCN< DerivFunType, ModelFunType, DataType >
virtual const DataType &	Data () const
	access to const reference to the data

std::shared_ptr< DataType >	DataPtr () const
	access to data pointer

virtual bool	HasHessian () const
	flag to indicate if can compute Hessian

virtual const IModelFunction &	ModelFunction () const
	access to const reference to the model function

std::shared_ptr< IModelFunction >	ModelFunctionPtr () const
	access to function pointer

Public Member Functions inherited from ROOT::Math::BasicFitMethodFunction< DerivFunType >
	BasicFitMethodFunction (int dim, int npoint)

virtual	~BasicFitMethodFunction ()
	Virtual Destructor (no operations)

virtual bool	G2 (const double , double ) const
	Computes the Second derivatives.

virtual bool	Hessian (const double x, double hess) const
	Computes the full Hessian.

bool	IsAGradFCN ()

virtual unsigned int	NCalls () const
	return the total number of function calls (override if needed)

virtual unsigned int	NDim () const
	Number of dimension (parameters) .

virtual unsigned int	NPoints () const
	return the number of data points used in evaluating the function

virtual void	ResetNCalls ()
	reset number of function calls

virtual void	UpdateNCalls () const
	update number of calls

Private Member Functions
virtual double	DoDerivative (const double *x, unsigned int icoord) const

virtual double	DoEval (const double *x) const
	Evaluation of the function (required by interface)

Private Attributes
::ROOT::EExecutionPolicy	fExecutionPolicy
	Execution policy.

std::vector< double >	fGrad
	for derivatives

bool	fIsExtended
	flag to indicate if is extended (when false is a Multinomial likelihood), default is true

unsigned int	fNEffPoints
	number of effective points used in the fit

int	fWeight
	flag to indicate if needs to evaluate using weight or weight squared (default weight = 0)

Additional Inherited Members
Static Public Member Functions inherited from ROOT::Math::BasicFitMethodFunction< DerivFunType >
static bool	IsAGradFCN ()
	Static function to indicate if a function is supporting gradient.

Protected Types inherited from ROOT::Fit::BasicFCN< DerivFunType, ModelFunType, DataType >
typedef BaseObjFunction::BaseFunction	BaseFunction

typedef ::ROOT::Math::BasicFitMethodFunction< DerivFunType >	BaseObjFunction

typedef ::ROOT::Math::IParametricGradFunctionMultiDimTempl< T >	IGradModelFunction

typedef ::ROOT::Math::IParamMultiFunctionTempl< T >	IModelFunction

typedef ModelFunType::BackendType	T

Protected Member Functions inherited from ROOT::Fit::BasicFCN< DerivFunType, ModelFunType, DataType >
	BasicFCN (const std::shared_ptr< DataType > &data, const std::shared_ptr< IModelFunction > &func)
	Constructor from data set and model function.

virtual	~BasicFCN ()
	Destructor (no operations)

void	SetData (const std::shared_ptr< DataType > &data)
	Set the data pointer.

void	SetModelFunction (const std::shared_ptr< IModelFunction > &func)
	Set the function pointer.

Protected Attributes inherited from ROOT::Fit::BasicFCN< DerivFunType, ModelFunType, DataType >
std::shared_ptr< DataType >	fData

std::shared_ptr< IModelFunction >	fFunc

#include <Fit/PoissonLikelihoodFCN.h>

Inheritance diagram for ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >:

[legend]

Member Typedef Documentation

◆ BaseFCN

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

typedef BasicFCN<DerivFunType,ModelFunType,BinData> ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::BaseFCN

Definition at line 50 of file PoissonLikelihoodFCN.h.

◆ BaseFunction

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

typedef BaseObjFunction::BaseFunction ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::BaseFunction

Definition at line 53 of file PoissonLikelihoodFCN.h.

◆ BaseObjFunction

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

typedef ::ROOT::Math::BasicFitMethodFunction<DerivFunType> ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::BaseObjFunction

Definition at line 52 of file PoissonLikelihoodFCN.h.

◆ IModelFunction

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

typedef ::ROOT::Math::IParamMultiFunctionTempl<T> ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::IModelFunction

Definition at line 55 of file PoissonLikelihoodFCN.h.

◆ T

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

typedef ModelFunType::BackendType ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::T

Definition at line 49 of file PoissonLikelihoodFCN.h.

◆ Type_t

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

typedef BaseObjFunction::Type_t ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::Type_t

Definition at line 56 of file PoissonLikelihoodFCN.h.

Constructor & Destructor Documentation

◆ PoissonLikelihoodFCN() [1/3]

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::PoissonLikelihoodFCN	(	const std::shared_ptr< BinData > &	data,
		const std::shared_ptr< IModelFunction > &	func,
		int	weight = `0`,
		bool	extended = `true`,
		const ::ROOT::EExecutionPolicy &	executionPolicy = `::ROOT::EExecutionPolicy::kSequential`
	)

inline

Constructor from unbin data set and model function (pdf)

Definition at line 61 of file PoissonLikelihoodFCN.h.

◆ PoissonLikelihoodFCN() [2/3]

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::PoissonLikelihoodFCN	(	const BinData &	data,
		const IModelFunction &	func,
		int	weight = `0`,
		bool	extended = `true`,
		const ::ROOT::EExecutionPolicy &	executionPolicy = `::ROOT::EExecutionPolicy::kSequential`
	)

inline

Constructor from unbin data set and model function (pdf) managed by the users.

Definition at line 73 of file PoissonLikelihoodFCN.h.

◆ ~PoissonLikelihoodFCN()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

virtual ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::~PoissonLikelihoodFCN ( )

inlinevirtual

Destructor (no operations)

Definition at line 86 of file PoissonLikelihoodFCN.h.

◆ PoissonLikelihoodFCN() [3/3]

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::PoissonLikelihoodFCN ( const PoissonLikelihoodFCN< DerivFunType, ModelFunType > & f )

inline

Copy constructor.

Definition at line 91 of file PoissonLikelihoodFCN.h.

Member Function Documentation

◆ Clone()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

virtual BaseFunction * ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::Clone ( ) const

inlinevirtual

clone the function (need to return Base for Windows)

Definition at line 115 of file PoissonLikelihoodFCN.h.

◆ DataElement()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

virtual double ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::DataElement	(	const double *	x,
		unsigned int	i,
		double *	g,
		double *	h,
		bool	fullHessian
	)		const

inlinevirtual

i-th likelihood element and its gradient

Implements ROOT::Math::BasicFitMethodFunction< DerivFunType >.

Definition at line 121 of file PoissonLikelihoodFCN.h.

◆ DoDerivative()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

virtual double ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::DoDerivative	(	const double *	x,
		unsigned int	icoord
	)		const

inlineprivatevirtual

Definition at line 195 of file PoissonLikelihoodFCN.h.

◆ DoEval()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

virtual double ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::DoEval ( const double * x ) const

inlineprivatevirtual

Evaluation of the function (required by interface)

Definition at line 188 of file PoissonLikelihoodFCN.h.

◆ Gradient()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

virtual void ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::Gradient	(	const double *	x,
		double *	g
	)		const

inlinevirtual

evaluate gradient

Definition at line 127 of file PoissonLikelihoodFCN.h.

◆ IsWeighted()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

bool ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::IsWeighted ( ) const

inline

Definition at line 163 of file PoissonLikelihoodFCN.h.

◆ NFitPoints()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

virtual unsigned int ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::NFitPoints ( ) const

inlinevirtual

Definition at line 118 of file PoissonLikelihoodFCN.h.

◆ operator=()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

PoissonLikelihoodFCN & ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::operator= ( const PoissonLikelihoodFCN< DerivFunType, ModelFunType > & rhs )

inline

Assignment operator.

Definition at line 103 of file PoissonLikelihoodFCN.h.

◆ Type()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

virtual BaseObjFunction::Type_t ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::Type ( ) const

inlinevirtual

Computes the full Hessian.

Return false if Hessian is not supported get type of fit method function

Reimplemented from ROOT::Math::BasicFitMethodFunction< DerivFunType >.

Definition at line 161 of file PoissonLikelihoodFCN.h.

◆ UseSumOfWeights()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

void ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::UseSumOfWeights ( )

inline

Definition at line 166 of file PoissonLikelihoodFCN.h.

◆ UseSumOfWeightSquare()

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

void ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::UseSumOfWeightSquare ( bool on = true )

inline

Definition at line 173 of file PoissonLikelihoodFCN.h.

Member Data Documentation

◆ fExecutionPolicy

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

::ROOT::EExecutionPolicy ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::fExecutionPolicy

private

Execution policy.

Definition at line 210 of file PoissonLikelihoodFCN.h.

◆ fGrad

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

std::vector<double> ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::fGrad

mutableprivate

for derivatives

Definition at line 208 of file PoissonLikelihoodFCN.h.

◆ fIsExtended

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

bool ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::fIsExtended

private

flag to indicate if is extended (when false is a Multinomial likelihood), default is true

Definition at line 203 of file PoissonLikelihoodFCN.h.

◆ fNEffPoints

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

unsigned int ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::fNEffPoints

mutableprivate

number of effective points used in the fit

Definition at line 206 of file PoissonLikelihoodFCN.h.

◆ fWeight

template<class DerivFunType , class ModelFunType = ROOT::Math::IParamMultiFunction>

int ROOT::Fit::PoissonLikelihoodFCN< DerivFunType, ModelFunType >::fWeight

private

flag to indicate if needs to evaluate using weight or weight squared (default weight = 0)

Definition at line 204 of file PoissonLikelihoodFCN.h.

math/mathcore/inc/Fit/PoissonLikelihoodFCN.h

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Member Typedef Documentation

◆ BaseFCN

◆ BaseFunction

◆ BaseObjFunction

◆ IModelFunction

◆ T

◆ Type_t

Constructor & Destructor Documentation

◆ PoissonLikelihoodFCN() [1/3]

◆ PoissonLikelihoodFCN() [2/3]

◆ ~PoissonLikelihoodFCN()

◆ PoissonLikelihoodFCN() [3/3]

Member Function Documentation

◆ Clone()

◆ DataElement()

◆ DoDerivative()

◆ DoEval()

◆ Gradient()

◆ IsWeighted()

◆ NFitPoints()

◆ operator=()

◆ Type()

◆ UseSumOfWeights()

◆ UseSumOfWeightSquare()

Member Data Documentation

◆ fExecutionPolicy

◆ fGrad

◆ fIsExtended

◆ fNEffPoints

◆ fWeight