13 #ifndef ROOT_Math_IParamFunction 14 #define ROOT_Math_IParamFunction 77 virtual unsigned int NPar()
const = 0;
122 return DoEvalPar(x, p);
135 virtual T DoEvalPar(
const T *
x,
const double *p)
const = 0;
166 using BaseFunc::operator();
177 return DoEvalPar(x, p);
186 return DoEvalPar(*x, p);
195 virtual double DoEvalPar(
double x,
const double *p)
const = 0;
242 return DoEvalPar(x, p);
256 unsigned int npar =
NPar();
257 for (
unsigned int ipar = 0; ipar < npar; ++ipar)
258 grad[ipar] = DoParameterDerivative(x, p, ipar);
266 return DoParameterDerivative(x, p, ipar);
278 return DoParameterDerivative(x,
Parameters() , ipar);
286 virtual T DoParameterDerivative(
const T *
x,
const double *p,
unsigned int ipar)
const = 0;
287 virtual T DoEvalPar(
const T *x,
const double *p)
const = 0;
326 using BaseParamFunc::operator();
334 unsigned int npar =
NPar();
335 for (
unsigned int ipar = 0; ipar < npar; ++ipar)
336 grad[ipar] = DoParameterDerivative(x, p, ipar);
344 return ParameterGradient(x,
Parameters(), grad);
352 ParameterGradient(*x, p, grad);
360 return ParameterGradient(*x,
Parameters(), grad);
369 return DoParameterDerivative(x, p, ipar);
377 return DoParameterDerivative(x,
Parameters() , ipar);
386 return DoParameterDerivative(*x, p, ipar);
395 return DoParameterDerivative(*x,
Parameters() , ipar);
406 virtual double DoParameterDerivative(
double x,
const double *p,
unsigned int ipar)
const = 0;
virtual const double * Parameters() const =0
Access the parameter values.
double ParameterDerivative(double x, unsigned int ipar=0) const
Evaluate partial derivative using cached parameter values.
Interface (abstract class) for generic functions objects of one-dimension Provides a method to evalua...
Interface (abstract class) for multi-dimensional functions providing a gradient calculation.
Namespace for new ROOT classes and functions.
double operator()(const double *x, const double *p) const
multidim-like interface
virtual T DoEval(const T *x) const
Implement the ROOT::Math::IBaseFunctionMultiDim interface DoEval(x) using the cached parameter values...
double ParameterDerivative(double x, const double *p, unsigned int ipar=0) const
Partial derivative with respect a parameter.
T operator()(const T *x, const double *p) const
Evaluate function at a point x and for given parameters p.
virtual ~IParametricGradFunctionOneDim()
Virtual Destructor (no operations)
IBaseFunctionOneDim BaseFunc
virtual ~IParametricGradFunctionMultiDimTempl()
Virtual Destructor (no operations)
void ParameterGradient(const T *x, T *grad) const
Evaluate all derivatives using cached parameter values.
IParametricFunctionOneDim BaseParamFunc
Interface (abstract class) for parametric gradient multi-dimensional functions providing in addition ...
IGradientFunctionOneDim BaseGradFunc
Interface (abstract class) for one-dimensional functions providing a gradient calculation.
virtual T DoEval(const T *x) const
Implement the ROOT::Math::IBaseFunctionMultiDim interface DoEval(x) using the cached parameter values...
void ParameterGradient(double x, double *grad) const
Evaluate all derivatives using cached parameter values.
virtual double DoEval(double x) const
Implement the ROOT::Math::IBaseFunctionOneDim interface DoEval(x) using the cached parameter values...
virtual ~IBaseParam()
Virtual Destructor (no operations)
Documentation for the abstract class IBaseFunctionMultiDim.
virtual unsigned int NPar() const =0
Return the number of Parameters.
T operator()(const T *x, const double *p) const
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...
void ParameterGradient(const double *x, double *grad) const
Evaluate all derivatives using cached parameter values (multi-dim like interface) ...
void ParameterGradient(const double *x, const double *p, double *grad) const
Compatibility interface with multi-dimensional functions.
virtual void ParameterGradient(const T *x, const double *p, T *grad) const
Evaluate the all the derivatives (gradient vector) of the function with respect to the parameters at ...
IParametricFunctionOneDim::BaseFunc BaseFunc
Interface (abstract class) for parametric one-dimensional gradient functions providing in addition to...
IParamFunction interface (abstract class) describing multi-dimensional parameteric functions It is a ...
T operator()(const T *x) const
virtual void SetParameters(const double *p)=0
Set the parameter values.
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...
Specialized IParamFunction interface (abstract class) for one-dimensional parametric functions It is ...
double ParameterDerivative(const double *x, unsigned int ipar=0) const
Evaluate partial derivative using cached parameter values (multi-dim like interface) ...
double operator()(double x, const double *p) const
Evaluate function at a point x and for given parameters p.
Namespace for new Math classes and functions.
IBaseFunctionMultiDimTempl< T > BaseFunc
std::string ToString(const T &val)
Utility function for conversion to strings.
T operator()(const T *x) const
T ParameterDerivative(const T *x, unsigned int ipar=0) const
Evaluate partial derivative using cached parameter values.
Documentation for the abstract class IBaseParam.
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 nam...
T ParameterDerivative(const T *x, const double *p, unsigned int ipar=0) const
Evaluate the partial derivative w.r.t a parameter ipar from values and parameters.