ROOT  6.06/09
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Public Types | Public Member Functions | Private Member Functions | List of all members
ROOT::Math::IParametricGradFunctionMultiDim Class Referenceabstract

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

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

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 223 of file IParamFunction.h.

Public Types

typedef IParametricFunctionMultiDim BaseParamFunc
 
typedef IGradientFunctionMultiDim BaseGradFunc
 
typedef IParametricFunctionMultiDim::BaseFunc BaseFunc
 
- Public Types inherited from ROOT::Math::IParametricFunctionMultiDim
typedef IBaseFunctionMultiDim BaseFunc
 
- Public Types inherited from ROOT::Math::IBaseFunctionMultiDim
typedef IBaseFunctionMultiDim BaseFunc
 

Public Member Functions

virtual ~IParametricGradFunctionMultiDim ()
 Virtual Destructor (no operations) More...
 
virtual void ParameterGradient (const double *x, const double *p, double *grad) const
 Evaluate the all the derivatives (gradient vector) of the function with respect to the parameters at a point x. More...
 
double ParameterDerivative (const double *x, const double *p, unsigned int ipar=0) const
 Evaluate the partial derivative w.r.t a parameter ipar from values and parameters. More...
 
void ParameterGradient (const double *x, double *grad) const
 Evaluate all derivatives using cached parameter values. More...
 
double ParameterDerivative (const double *x, unsigned int ipar=0) const
 Evaluate partial derivative using cached parameter values. More...
 
- Public Member Functions inherited from ROOT::Math::IParametricFunctionMultiDim
double operator() (const double *x, const double *p) const
 Evaluate function at a point x and for given parameters p. More...
 
- Public Member Functions inherited from ROOT::Math::IBaseFunctionMultiDim
 IBaseFunctionMultiDim ()
 
virtual ~IBaseFunctionMultiDim ()
 virtual destructor More...
 
virtual IBaseFunctionMultiDimClone () const =0
 Clone a function. More...
 
virtual unsigned int NDim () const =0
 Retrieve the dimension of the function. 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 const doubleParameters () const =0
 Access the parameter values. More...
 
virtual void SetParameters (const double *p)=0
 Set the parameter values. 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...
 

Private Member Functions

virtual double DoParameterDerivative (const double *x, const double *p, unsigned int ipar) const =0
 Evaluate the partial derivative w.r.t a parameter ipar , to be implemented by the derived classes. More...
 

#include <Math/IParamFunction.h>

+ Inheritance diagram for ROOT::Math::IParametricGradFunctionMultiDim:
+ Collaboration diagram for ROOT::Math::IParametricGradFunctionMultiDim:

Member Typedef Documentation

Definition at line 232 of file IParamFunction.h.

Definition at line 231 of file IParamFunction.h.

Definition at line 230 of file IParamFunction.h.

Constructor & Destructor Documentation

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

Virtual Destructor (no operations)

Definition at line 238 of file IParamFunction.h.

Member Function Documentation

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

Evaluate the partial derivative w.r.t a parameter ipar , to be implemented by the derived classes.

Implemented in ROOT::Math::MultiDimParamGradFunctionAdapter, ROOT::Math::WrappedMultiTF1, GaussFunction, and GaussFunction.

Referenced by ParameterDerivative(), and ParameterGradient().

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

Evaluate the partial derivative w.r.t a parameter ipar from values and parameters.

Definition at line 257 of file IParamFunction.h.

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

Evaluate partial derivative using cached parameter values.

Definition at line 270 of file IParamFunction.h.

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

Evaluate the all the derivatives (gradient vector) 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

Reimplemented in ROOT::Math::MultiDimParamGradFunctionAdapter, ROOT::Math::WrappedMultiTF1, GaussFunction, and GaussFunction.

Definition at line 248 of file IParamFunction.h.

Referenced by ROOT::Fit::FitUtil::EvaluateChi2Gradient(), ROOT::Fit::FitUtil::EvaluateChi2Residual(), ROOT::Fit::FitUtil::EvaluateLogLGradient(), ROOT::Fit::FitUtil::EvaluatePdf(), ROOT::Fit::FitUtil::EvaluatePoissonBinPdf(), ROOT::Fit::FitUtil::EvaluatePoissonLogLGradient(), and ParameterGradient().

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

Evaluate all derivatives using cached parameter values.

Definition at line 264 of file IParamFunction.h.


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