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ROOT » MATH » MATHCORE » ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>

class ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>: public ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>


   class evaluating the log likelihood
   for binned Poisson likelihood fits
   it is template to distinguish gradient and non-gradient case

   @ingroup  FitMethodFunc

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

ROOT::Fit::PoissonLLGradFunction, ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IMultiGradFunction>

Function Members (Methods)

public:
virtual~PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>()
virtual ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>::BaseFunction*Clone() const
virtual const ROOT::Fit::BinData&Data() const
virtual doubleDataElement(const double* x, unsigned int i, double* g) const
doubleROOT::Math::IGradientMultiDim::Derivative(const double* x, unsigned int icoord = 0) const
virtual voidROOT::Math::IGradientFunctionMultiDim::FdF(const double* x, double& f, double* df) const
virtual voidGradient(const double* x, double* g) const
virtual const ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>::IModelFunction&ModelFunction() const
virtual unsigned intROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::NCalls() const
virtual unsigned intROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::NDim() const
virtual unsigned intNFitPoints() const
virtual unsigned intROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::NPoints() const
doubleROOT::Math::IBaseFunctionMultiDim::operator()(const double* x) const
ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>(const ROOT::Fit::BinData& data, const ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>::IModelFunction& func)
virtual voidROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::ResetNCalls()
virtual ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::Type_tType() const
virtual voidROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::UpdateNCalls() const
private:
virtual doubleDoDerivative(const double* x, unsigned int icoord) const
virtual doubleDoEval(const double* x) const
ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>&operator=(const ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>& rhs)
ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>(const ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>&)

Data Members

public:
enum ROOT::Math::BasicFitMethodFunction::Type_t { kUndefined
kLeastSquare
kLogLikelihood
};
private:
const ROOT::Fit::BinData&fData
const ROOT::Fit::PoissonLikelihoodFCN<ROOT::Math::IGradientFunctionMultiDim>::IModelFunction&fFunc
vector<double>fGradfor derivatives
unsigned intfNEffPointsnumber of effective points used in the fit

Class Charts

Inheritance Inherited Members Includes Libraries
Class Charts

Function documentation

BaseFunction * Clone() const
 clone the function (need to return Base for Windows)
{ return new PoissonLikelihoodFCN(fData,fFunc); }
unsigned int NFitPoints() const
 effective points used in the fit
{ return fNEffPoints; }
double DataElement(const double* x, unsigned int i, double* g) const
 i-th likelihood element and its gradient
void Gradient(const double* x, double* g) const
 evaluate gradient
double DoEval(const double* x) const
      Evaluation of the  function (required by interface)

double DoDerivative(const double* x, unsigned int icoord) const
 for derivatives