class ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>: public ROOT::Math::IBaseFunctionMultiDim


   FitMethodFunction class
   Interface for objective functions (like chi2 and likelihood used in the fit)
   In addition to normal function interface provide interface for calculating each
   data contrinution to the function which is required by some algorithm (like Fumili)

   @ingroup  FitMethodFunc

This class is also known as (typedefs to this class)

ROOT::Math::FitMethodFunction, ROOT::Math::BasicFitMethodFunction<ROOT::Math::IMultiGenFunction>

Function Members (Methods)

This is an abstract class, constructors will not be documented.
Look at the header to check for available constructors.

public:

virtual	~BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>()
virtual ROOT::Math::IBaseFunctionMultiDim*	ROOT::Math::IBaseFunctionMultiDim::Clone() const
virtual double	DataElement(const double* x, unsigned int i, double* g = 0) const
virtual ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>::Type	GetType() const
virtual unsigned int	NCalls() const
virtual unsigned int	ROOT::Math::IBaseFunctionMultiDim::NDim() const
virtual unsigned int	NPoints() const
double	ROOT::Math::IBaseFunctionMultiDim::operator()(const double* x) const
ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>&	operator=(const ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>&)

Data Members

public:

enum Type {	kUndefined
	kLeastSquare
	kLogLikelihood
};

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

double DataElement(const double* x, unsigned int i, double* g = 0) const

      method returning the data i-th contribution to the fit objective function
      For example the residual for the least square functions or the pdf element for the
      likelihood functions.
      Estimating eventually also the gradient of the data element if the passed pointer  is not null

unsigned int NPoints()

      return the number of data points used in evaluating the function

Type GetType()

      return the type of method, override if needed

{ return kUndefined; }

unsigned int NCalls()

      return the total number of function calls (overrided if needed)

{ return 0; }

Author: L. Moneta Thu Aug 16 15:40:28 2007
Last change: root/mathcore:$Id: FitMethodFunction.h 24482 2008-06-23 15:33:08Z moneta $
Last generated: 2008-06-25 08:29
Copyright (c) 2007 LCG ROOT Math Team, CERN/PH-SFT *

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