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TF1_EvalWrapper Class Reference

Definition at line 189 of file TF1.cxx.

Public Types

typedef IBaseFunctionOneDim BaseFunc

Public Member Functions

 TF1_EvalWrapper (TF1 *f, const Double_t *par, bool useAbsVal, Double_t n=1, Double_t x0=0)
ROOT::Math::IGenFunction * Clone () const override
 Clone a function.
double Derivative (const double *x) const
 Compatibility method with multi-dimensional interface for partial derivative.
double Derivative (double x) const
 Return the derivative of the function at a point x Use the private method DoDerivative.
Double_t DoEval (Double_t x) const override
 implementation of the evaluation function. Must be implemented by derived classes
Double_t EvalFirstMom (Double_t x)
Double_t EvalNMom (Double_t x) const
void FdF (const double *x, double &f, double *df) const
 Compatibility method with multi-dimensional interface for Gradient and function evaluation.
virtual void FdF (double x, double &f, double &df) const
 Optimized method to evaluate at the same time the function value and derivative at a point x.
void Gradient (const double *x, double *g) const
 Compatibility method with multi-dimensional interface for Gradient.
virtual bool HasGradient () const
double operator() (const double *x) const
 Evaluate the function at a point x[].
double operator() (double x) const
 Evaluate the function at a point x.

Public Attributes

Bool_t fAbsVal
TF1 * fFunc
Double_t fN
const double * fPar
Double_t fX [1]
Double_t fX0

Private Member Functions

virtual double DoDerivative (double) const
 Function to evaluate the derivative with respect each coordinate. To be implemented by the derived class.
Inheritance diagram for TF1_EvalWrapper:
ROOT::Math::IBaseFunctionOneDim

Member Typedef Documentation

◆ BaseFunc

typedef IBaseFunctionOneDim ROOT::Math::IBaseFunctionOneDim::BaseFunc
inherited

Definition at line 161 of file IFunction.h.

Constructor & Destructor Documentation

◆ TF1_EvalWrapper()

TF1_EvalWrapper::TF1_EvalWrapper ( TF1 * f,
const Double_t * par,
bool useAbsVal,
Double_t n = 1,
Double_t x0 = 0 )
inline

Definition at line 191 of file TF1.cxx.

Member Function Documentation

◆ Clone()

ROOT::Math::IGenFunction * TF1_EvalWrapper::Clone ( ) const
inlineoverridevirtual

Clone a function.

Each derived class will implement their version of the private DoClone method.

Implements ROOT::Math::IBaseFunctionOneDim.

Definition at line 202 of file TF1.cxx.

◆ Derivative() [1/2]

double ROOT::Math::IBaseFunctionOneDim::Derivative ( const double * x) const
inlineinherited

Compatibility method with multi-dimensional interface for partial derivative.

Definition at line 186 of file IFunction.h.

◆ Derivative() [2/2]

double ROOT::Math::IBaseFunctionOneDim::Derivative ( double x) const
inlineinherited

Return the derivative of the function at a point x Use the private method DoDerivative.

Definition at line 183 of file IFunction.h.

◆ DoDerivative()

virtual double ROOT::Math::IBaseFunctionOneDim::DoDerivative ( double ) const
inlineprivatevirtualinherited

Function to evaluate the derivative with respect each coordinate. To be implemented by the derived class.

Reimplemented in ROOT::Math::GradFunctor1D, ROOT::Math::Polynomial, and ROOT::Math::WrappedTF1.

Definition at line 210 of file IFunction.h.

◆ DoEval()

Double_t TF1_EvalWrapper::DoEval ( Double_t x) const
inlineoverridevirtual

implementation of the evaluation function. Must be implemented by derived classes

Implements ROOT::Math::IBaseFunctionOneDim.

Definition at line 210 of file TF1.cxx.

◆ EvalFirstMom()

Double_t TF1_EvalWrapper::EvalFirstMom ( Double_t x)
inline

Definition at line 219 of file TF1.cxx.

◆ EvalNMom()

Double_t TF1_EvalWrapper::EvalNMom ( Double_t x) const
inline

Definition at line 225 of file TF1.cxx.

◆ FdF() [1/2]

void ROOT::Math::IBaseFunctionOneDim::FdF ( const double * x,
double & f,
double * df ) const
inlineinherited

Compatibility method with multi-dimensional interface for Gradient and function evaluation.

Definition at line 202 of file IFunction.h.

◆ FdF() [2/2]

virtual void ROOT::Math::IBaseFunctionOneDim::FdF ( double x,
double & f,
double & df ) const
inlinevirtualinherited

Optimized method to evaluate at the same time the function value and derivative at a point x.

Often both value and derivatives are needed and it is often more efficient to compute them at the same time. Derived class should implement this method if performances play an important role and if it is faster to evaluate value and derivative at the same time.

Reimplemented in ROOT::Math::Polynomial, and ROOT::Math::WrappedTF1.

Definition at line 195 of file IFunction.h.

◆ Gradient()

void ROOT::Math::IBaseFunctionOneDim::Gradient ( const double * x,
double * g ) const
inlineinherited

Compatibility method with multi-dimensional interface for Gradient.

Definition at line 189 of file IFunction.h.

◆ HasGradient()

virtual bool ROOT::Math::IBaseFunctionOneDim::HasGradient ( ) const
inlinevirtualinherited

Reimplemented in ROOT::Math::IGradientFunctionOneDim.

Definition at line 179 of file IFunction.h.

◆ operator()() [1/2]

double ROOT::Math::IBaseFunctionOneDim::operator() ( const double * x) const
inlineinherited

Evaluate the function at a point x[].

Compatible method with multi-dimensional functions.

Definition at line 175 of file IFunction.h.

◆ operator()() [2/2]

double ROOT::Math::IBaseFunctionOneDim::operator() ( double x) const
inlineinherited

Evaluate the function at a point x.

Use the a pure virtual private method DoEval which must be implemented by sub-classes.

Definition at line 171 of file IFunction.h.

Member Data Documentation

◆ fAbsVal

Bool_t TF1_EvalWrapper::fAbsVal

Definition at line 234 of file TF1.cxx.

◆ fFunc

TF1* TF1_EvalWrapper::fFunc

Definition at line 231 of file TF1.cxx.

◆ fN

Double_t TF1_EvalWrapper::fN

Definition at line 235 of file TF1.cxx.

◆ fPar

const double* TF1_EvalWrapper::fPar

Definition at line 233 of file TF1.cxx.

◆ fX

Double_t TF1_EvalWrapper::fX[1]
mutable

Definition at line 232 of file TF1.cxx.

◆ fX0

Double_t TF1_EvalWrapper::fX0

Definition at line 236 of file TF1.cxx.

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