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Reference Guide
ROOT::Math::IParametricGradFunctionOneDim Class Referenceabstract

Interface (abstract class) for parametric one-dimensional gradient functions providing in addition to function evaluation with respect the coordinates also the gradient with respect to the parameters, via the method ParameterGradient.

It is a derived class from ROOT::Math::IParametricFunctionOneDim.

The pure private virtual method DoParameterGradient must be implemented by the derived classes in addition to those inherited by the base abstract classes.

Definition at line 308 of file IParamFunction.h.

Public Types

typedef IParametricFunctionOneDim::BaseFunc BaseFunc
 
typedef IGradientFunctionOneDim BaseGradFunc
 
typedef IParametricFunctionOneDim BaseParamFunc
 
- Public Types inherited from ROOT::Math::IParametricFunctionOneDim
typedef IBaseFunctionOneDim BaseFunc
 
- Public Types inherited from ROOT::Math::IBaseFunctionOneDim
typedef IBaseFunctionOneDim BaseFunc
 

Public Member Functions

virtual ~IParametricGradFunctionOneDim ()
 Virtual Destructor (no operations) 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...
 
virtual void ParameterGradient (double x, const double *p, double *grad) const
 Evaluate the derivatives of the function with respect to the parameters at a point x. 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...
 
- 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...
 
virtual IBaseFunctionOneDimClone () 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 DoParameterDerivative (double x, const double *p, unsigned int ipar) const =0
 Evaluate the gradient, to be implemented by the derived classes. More...
 

#include <Math/IParamFunction.h>

Inheritance diagram for ROOT::Math::IParametricGradFunctionOneDim:
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Member Typedef Documentation

◆ BaseFunc

◆ BaseGradFunc

◆ BaseParamFunc

Constructor & Destructor Documentation

◆ ~IParametricGradFunctionOneDim()

virtual ROOT::Math::IParametricGradFunctionOneDim::~IParametricGradFunctionOneDim ( )
inlinevirtual

Virtual Destructor (no operations)

Definition at line 323 of file IParamFunction.h.

Member Function Documentation

◆ DoParameterDerivative()

virtual double ROOT::Math::IParametricGradFunctionOneDim::DoParameterDerivative ( double  x,
const double *  p,
unsigned int  ipar 
) const
privatepure virtual

Evaluate the gradient, to be implemented by the derived classes.

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

◆ ParameterDerivative() [1/4]

double ROOT::Math::IParametricGradFunctionOneDim::ParameterDerivative ( double  x,
const double *  p,
unsigned int  ipar = 0 
) const
inline

Partial derivative with respect a parameter.

Definition at line 367 of file IParamFunction.h.

◆ ParameterDerivative() [2/4]

double ROOT::Math::IParametricGradFunctionOneDim::ParameterDerivative ( double  x,
unsigned int  ipar = 0 
) const
inline

Evaluate partial derivative using cached parameter values.

Definition at line 375 of file IParamFunction.h.

◆ ParameterDerivative() [3/4]

double ROOT::Math::IParametricGradFunctionOneDim::ParameterDerivative ( const double *  x,
const double *  p,
unsigned int  ipar = 0 
) const
inline

Partial derivative with respect a parameter Compatibility interface with multi-dimensional functions.

Definition at line 384 of file IParamFunction.h.

◆ ParameterDerivative() [4/4]

double ROOT::Math::IParametricGradFunctionOneDim::ParameterDerivative ( const double *  x,
unsigned int  ipar = 0 
) const
inline

Evaluate partial derivative using cached parameter values (multi-dim like interface)

Definition at line 393 of file IParamFunction.h.

◆ ParameterGradient() [1/4]

virtual void ROOT::Math::IParametricGradFunctionOneDim::ParameterGradient ( double  x,
const double *  p,
double *  grad 
) const
inlinevirtual

Evaluate the derivatives of the function with respect to the parameters at a point x.

It is optional to be implemented by the derived classes for better efficiency if needed

Reimplemented in ROOT::Math::WrappedTF1.

Definition at line 332 of file IParamFunction.h.

◆ ParameterGradient() [2/4]

void ROOT::Math::IParametricGradFunctionOneDim::ParameterGradient ( double  x,
double *  grad 
) const
inline

Evaluate all derivatives using cached parameter values.

Definition at line 342 of file IParamFunction.h.

◆ ParameterGradient() [3/4]

void ROOT::Math::IParametricGradFunctionOneDim::ParameterGradient ( const double *  x,
const double *  p,
double *  grad 
) const
inline

Compatibility interface with multi-dimensional functions.

Definition at line 350 of file IParamFunction.h.

◆ ParameterGradient() [4/4]

void ROOT::Math::IParametricGradFunctionOneDim::ParameterGradient ( const double *  x,
double *  grad 
) const
inline

Evaluate all derivatives using cached parameter values (multi-dim like interface)

Definition at line 358 of file IParamFunction.h.

Libraries for ROOT::Math::IParametricGradFunctionOneDim:
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The documentation for this class was generated from the following file: