ROOT 6.08/07 Reference Guide |
template wrapped class for adapting to FCNBase signature a IGradFunction
Definition at line 38 of file FCNGradAdapter.h.
Public Member Functions | |
FCNGradAdapter (const Function &f, double up=1.) | |
~FCNGradAdapter () | |
bool | CheckGradient () const |
std::vector< double > | Gradient (const std::vector< double > &v) const |
double | operator() (const std::vector< double > &v) const |
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. More... | |
double | operator() (const double *v) const |
double | Up () const |
Error definition of the function. More... | |
Public Member Functions inherited from ROOT::Minuit2::FCNGradientBase | |
virtual | ~FCNGradientBase () |
Public Member Functions inherited from ROOT::Minuit2::FCNBase | |
virtual | ~FCNBase () |
virtual double | ErrorDef () const |
Error definition of the function. More... | |
virtual void | SetErrorDef (double) |
add interface to set dynamically a new error definition Re-implement this function if needed. More... | |
Public Member Functions inherited from ROOT::Minuit2::GenericFunction | |
virtual | ~GenericFunction () |
Private Attributes | |
const Function & | fFunc |
std::vector< double > | fGrad |
double | fUp |
#include <Minuit2/FCNGradAdapter.h>
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inline |
Definition at line 42 of file FCNGradAdapter.h.
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inline |
Definition at line 49 of file FCNGradAdapter.h.
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inlinevirtual |
Reimplemented from ROOT::Minuit2::FCNGradientBase.
Definition at line 74 of file FCNGradAdapter.h.
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inlinevirtual |
Implements ROOT::Minuit2::FCNGradientBase.
Definition at line 61 of file FCNGradAdapter.h.
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inlinevirtual |
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.
par | function parameters as defined by the user. |
Implements ROOT::Minuit2::FCNBase.
Definition at line 52 of file FCNGradAdapter.h.
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inline |
Definition at line 55 of file FCNGradAdapter.h.
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inlinevirtual |
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 59 of file FCNGradAdapter.h.
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private |
Definition at line 77 of file FCNGradAdapter.h.
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mutableprivate |
Definition at line 79 of file FCNGradAdapter.h.
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private |
Definition at line 78 of file FCNGradAdapter.h.