Class to Wrap a ROOT Function class (like TF1) in a IParamFunction interface of one dimensions to be used in the ROOT::Math numerical algorithms The wrapper does not own bby default the TF1 pointer, so it assumes it exists during the wrapper lifetime.

The class from ROOT version 6.03 does not contain anymore a copy of the parameters. The parameters are stored in the TF1 class.

Definition at line 41 of file WrappedTF1.h.

Public Types
typedef ROOT::Math::IGradientOneDim	IGrad

typedef ROOT::Math::IParamGradFunction	BaseGradFunc

typedef ROOT::Math::IParamGradFunction::BaseFunc	BaseFunc

Public Types inherited from ROOT::Math::IParametricGradFunctionOneDim
typedef IParametricFunctionOneDim	BaseParamFunc

typedef IGradientFunctionOneDim	BaseGradFunc

typedef IParametricFunctionOneDim::BaseFunc	BaseFunc

Public Types inherited from ROOT::Math::IParametricFunctionOneDim
typedef IBaseFunctionOneDim	BaseFunc

Public Types inherited from ROOT::Math::IBaseFunctionOneDim
typedef IBaseFunctionOneDim	BaseFunc

Public Member Functions
	WrappedTF1 (TF1 &f)
	constructor from a TF1 function pointer. More...

virtual	~WrappedTF1 ()
	Destructor (no operations). More...

	WrappedTF1 (const WrappedTF1 &rhs)
	Copy constructor. More...

WrappedTF1 &	operator= (const WrappedTF1 &rhs)
	Assignment operator. More...

interface inherited from IFunction
ROOT::Math::IGenFunction *	Clone () const
	Clone the wrapper but not the original function. More...

Public Member Functions inherited from ROOT::Math::IParametricGradFunctionOneDim
virtual	~IParametricGradFunctionOneDim ()
	Virtual Destructor (no operations) More...

void	ParameterGradient (double x, double *grad) const
	Evaluate all derivatives using cached parameter values. More...

void	ParameterGradient (const double x, const double p, double *grad) const
	Compatibility interface with multi-dimensional functions. More...

void	ParameterGradient (const double x, double grad) const
	Evaluate all derivatives using cached parameter values (multi-dim like interface) More...

double	ParameterDerivative (double x, const double *p, unsigned int ipar=0) const
	Partial derivative with respect a parameter. More...

double	ParameterDerivative (double x, unsigned int ipar=0) const
	Evaluate partial derivative using cached parameter values. More...

double	ParameterDerivative (const double x, const double p, unsigned int ipar=0) const
	Partial derivative with respect a parameter Compatibility interface with multi-dimensional functions. More...

double	ParameterDerivative (const double *x, unsigned int ipar=0) const
	Evaluate partial derivative using cached parameter values (multi-dim like interface) More...

Public Member Functions inherited from ROOT::Math::IParametricFunctionOneDim
double	operator() (double x, const double *p) const
	Evaluate function at a point x and for given parameters p. More...

double	operator() (const double x, const double p) const
	multidim-like interface More...

Public Member Functions inherited from ROOT::Math::IBaseFunctionOneDim
	IBaseFunctionOneDim ()

virtual	~IBaseFunctionOneDim ()
	virtual destructor More...

double	operator() (double x) const
	Evaluate the function at a point x Use the a pure virtual private method DoEval which must be implemented by sub-classes. More...

double	operator() (const double *x) const
	Evaluate the function at a point x[]. More...

Public Member Functions inherited from ROOT::Math::IBaseParam
virtual	~IBaseParam ()
	Virtual Destructor (no operations) More...

Public Member Functions inherited from ROOT::Math::IGradientOneDim
virtual	~IGradientOneDim ()
	virtual destructor More...

double	Derivative (double x) const
	Return the derivative of the function at a point x Use the private method DoDerivative. More...

double	Derivative (const double *x) const
	Compatibility method with multi-dimensional interface for partial derivative. More...

void	Gradient (const double x, double g) const
	Compatibility method with multi-dimensional interface for Gradient. More...

void	FdF (const double x, double &f, double df) const
	Compatibility method with multi-dimensional interface for Gradient and function evaluation. More...

interface inherited from IParamFunction
bool	fLinear

bool	fPolynomial

TF1 *	fFunc

double	fX [1]

static double	fgEps = 0.001
	cached vector for x value (needed for TF1::EvalPar signature) More...

const double *	Parameters () const
	get the parameter values (return values cachen inside, those inside TF1 might be different) More...

void	SetParameters (const double *p)
	set parameter values More...

unsigned int	NPar () const
	return number of parameters More...

std::string	ParameterName (unsigned int i) const
	return parameter name (this is stored in TF1) More...

void	ParameterGradient (double x, const double par, double grad) const
	evaluate the derivative of the function with respect to the parameters More...

void	FdF (double x, double &f, double &deriv) const
	calculate function and derivative at same time (required by IGradient interface) More...

static void	SetDerivPrecision (double eps)
	precision value used for calculating the derivative step-size h = eps * \|x\|. More...

static double	GetDerivPrecision ()
	get precision value used for calculating the derivative step-size More...

double	DoEvalPar (double x, const double *p) const
	evaluate function passing coordinates x and vector of parameters More...

double	DoEval (double x) const
	evaluate function using the cached parameter values (of TF1) re-implement for better efficiency More...

double	DoDerivative (double x) const
	return the function derivatives w.r.t. x More...

double	DoParameterDerivative (double x, const double *p, unsigned int ipar) const
	evaluate the derivative of the function with respect to the parameters More...