Specialized IParamFunction interface (abstract class) for one-dimensional parametric functions It is a derived class from ROOT::Math::IBaseFunctionOneDim and ROOT::Math::IBaseParam.

Definition at line 156 of file IParamFunction.h.

Public Types
typedef IBaseFunctionOneDim	BaseFunc

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

Public Member Functions
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...

virtual IBaseFunctionOneDim *	Clone () const =0
	Clone a function. 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...

virtual unsigned int	NPar () const =0
	Return the number of Parameters. More...

virtual std::string	ParameterName (unsigned int i) const
	Return the name of the i-th parameter (starting from zero) Overwrite if want to avoid the default name ("Par_0, Par_1, ...") More...

virtual const double *	Parameters () const =0
	Access the parameter values. More...

virtual void	SetParameters (const double *p)=0
	Set the parameter values. More...

Private Member Functions
virtual double	DoEval (double x) const
	Implement the ROOT::Math::IBaseFunctionOneDim interface DoEval(x) using the cached parameter values. More...

virtual double	DoEvalPar (double x, const double *p) const =0
	Implementation of the evaluation function using the x value and the parameters. More...

#include <Math/IParamFunction.h>

Inheritance diagram for ROOT::Math::IParametricFunctionOneDim:

[legend]

Member Typedef Documentation

◆ BaseFunc

typedef IBaseFunctionOneDim ROOT::Math::IParametricFunctionOneDim::BaseFunc

Definition at line 163 of file IParamFunction.h.

Member Function Documentation

◆ DoEval()

virtual double ROOT::Math::IParametricFunctionOneDim::DoEval ( double x ) const

inlineprivatevirtual

Implement the ROOT::Math::IBaseFunctionOneDim interface DoEval(x) using the cached parameter values.

Implements ROOT::Math::IBaseFunctionOneDim.

Reimplemented in ROOT::Math::WrappedTF1, ROOT::Math::VavilovAccurateCdf, ROOT::Math::VavilovAccuratePdf, and ROOT::Math::VavilovAccurateQuantile.

Definition at line 200 of file IParamFunction.h.

◆ DoEvalPar()

virtual double ROOT::Math::IParametricFunctionOneDim::DoEvalPar	(	double	x,
		const double *	p
	)		const

privatepure virtual

Implementation of the evaluation function using the x value and the parameters.

Must be implemented by derived classes

Implemented in ROOT::Math::Polynomial, ROOT::Math::WrappedTF1, ROOT::Math::VavilovAccurateCdf, ROOT::Math::VavilovAccuratePdf, and ROOT::Math::VavilovAccurateQuantile.

◆ operator()() [1/2]

double ROOT::Math::IParametricFunctionOneDim::operator()	(	double	x,
		const double *	p
	)		const

inline

Evaluate function at a point x and for given parameters p.

This method does not change the internal status of the function (internal parameter values). If for some reason one prefers caching the parameter values, SetParameters(p) and then operator()(x) should be called. Use the pure virtual function DoEvalPar to implement it

Definition at line 175 of file IParamFunction.h.