template wrapped class for adapting to FCNBase signature a IGradFunction
Definition at line 35 of file FCNGradAdapter.h.
Public Member Functions | |
FCNGradAdapter (const Function &f, double up=1.) | |
~FCNGradAdapter () override | |
std::vector< double > | G2 (std::span< const double > x) const override |
return second derivatives (diagonal of the Hessian matrix) | |
std::vector< double > | Gradient (std::span< const double > v) const override |
std::vector< double > | GradientWithPrevResult (std::span< const double > v, double *previous_grad, double *previous_g2, double *previous_gstep) const override |
GradientParameterSpace | gradParameterSpace () const override |
bool | HasG2 () const override |
bool | HasGradient () const override |
bool | HasHessian () const override |
std::vector< double > | Hessian (std::span< const double > x) const override |
compute Hessian. Return Hessian as a std::vector of size(n*n) | |
double | operator() (const double *v) const |
double | operator() (std::span< const double > v) const override |
The meaning of the vector of parameters is of course defined by the user, who uses the values of those parameters to calculate their function Value. | |
void | SetErrorDef (double up) override |
add interface to set dynamically a new error definition Re-implement this function if needed. | |
template<class Func > | |
void | SetG2Function (Func f) |
template<class Func > | |
void | SetHessianFunction (Func f) |
double | Up () const override |
Error definition of the function. | |
Public Member Functions inherited from ROOT::Minuit2::FCNBase | |
virtual double | ErrorDef () const |
Error definition of the function. | |
Public Member Functions inherited from ROOT::Minuit2::GenericFunction | |
virtual | ~GenericFunction () |
Private Attributes | |
const Function & | fFunc |
std::function< std::vector< double >(std::span< const double >)> | fG2Func |
std::vector< double > | fG2Vec |
std::vector< double > | fGrad |
std::vector< double > | fHessian |
std::function< bool(std::span< const double >, double *)> | fHessianFunc |
double | fUp |
#include <Minuit2/FCNGradAdapter.h>
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inline |
Definition at line 38 of file FCNGradAdapter.h.
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inlineoverride |
Definition at line 40 of file FCNGradAdapter.h.
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inlineoverridevirtual |
return second derivatives (diagonal of the Hessian matrix)
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 70 of file FCNGradAdapter.h.
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inlineoverridevirtual |
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 49 of file FCNGradAdapter.h.
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inlineoverridevirtual |
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 54 of file FCNGradAdapter.h.
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inlineoverridevirtual |
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 61 of file FCNGradAdapter.h.
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inlineoverridevirtual |
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 107 of file FCNGradAdapter.h.
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inlineoverridevirtual |
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 42 of file FCNGradAdapter.h.
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inlineoverridevirtual |
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 110 of file FCNGradAdapter.h.
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inlineoverridevirtual |
compute Hessian. Return Hessian as a std::vector of size(n*n)
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 91 of file FCNGradAdapter.h.
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inline |
Definition at line 45 of file FCNGradAdapter.h.
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inlineoverridevirtual |
The meaning of the vector of parameters is of course defined by the user, who uses the values of those parameters to calculate their function Value.
The order and the position of these parameters is strictly the one specified by the user when supplying the starting values for minimization. The starting values must be specified by the user, either via an std::vector<double> or the MnUserParameters supplied as input to the MINUIT minimizers such as VariableMetricMinimizer or MnMigrad. Later values are determined by MINUIT as it searches for the Minimum or performs whatever analysis is requested by the user.
v | function parameters as defined by the user. |
Implements ROOT::Minuit2::FCNBase.
Definition at line 44 of file FCNGradAdapter.h.
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inlineoverridevirtual |
add interface to set dynamically a new error definition Re-implement this function if needed.
Reimplemented from ROOT::Minuit2::FCNBase.
Definition at line 120 of file FCNGradAdapter.h.
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inline |
Definition at line 115 of file FCNGradAdapter.h.
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inline |
Definition at line 118 of file FCNGradAdapter.h.
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inlineoverridevirtual |
Error definition of the function.
MINUIT defines Parameter errors as the change in Parameter Value required to change the function Value by up. Normally, for chisquared fits it is 1, and for negative log likelihood, its Value is 0.5. If the user wants instead the 2-sigma errors for chisquared fits, it becomes 4, as Chi2(x+n*sigma) = Chi2(x) + n*n.
Implements ROOT::Minuit2::FCNBase.
Definition at line 47 of file FCNGradAdapter.h.
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private |
Definition at line 123 of file FCNGradAdapter.h.
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private |
Definition at line 129 of file FCNGradAdapter.h.
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mutableprivate |
Definition at line 127 of file FCNGradAdapter.h.
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mutableprivate |
Definition at line 125 of file FCNGradAdapter.h.
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mutableprivate |
Definition at line 126 of file FCNGradAdapter.h.
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mutableprivate |
Definition at line 130 of file FCNGradAdapter.h.
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private |
Definition at line 124 of file FCNGradAdapter.h.