GooFit::Minuit1 Class Reference

#include <FitManagerMinuit1.h>

Inheritance diagram for GooFit::Minuit1:

Public Member Functions
	Minuit1 (PdfBase *pdfPointer)
Int_t	Eval (Int_t npar, Double_t *grad, Double_t &fval, Double_t *par, Int_t flag) override
	Fit function for Minuit. More...
std::vector< Variable >	getVaraibles () const

Detailed Description

Definition at line 11 of file FitManagerMinuit1.h.

Constructor & Destructor Documentation

Minuit1()

GooFit::Minuit1::Minuit1

(

PdfBase *

pdfPointer

)

Definition at line 13 of file FitManagerMinuit1.cpp.

References GooFit::PdfBase::copyParams().

    : TMinuit(max_index(pdfPointer->getParameters()) + 1)
    , pdfPointer(pdfPointer)
    , vars(pdfPointer->getParameters()) {
    int counter = 0;

    for(Variable &var : vars) {
        var.setFitterIndex(counter);

        Int_t err = DefineParameter(
            counter, var.getName().c_str(), var.getValue(), var.getError(), var.getLowerLimit(), var.getUpperLimit());

        if(GetNumPars() != counter + 1)
            throw GooFit::GeneralError(
                "Error when implementing param {} (possibly invalid error/lowerlimit/upperlimit values)!",
                var.getName());

        if(err != 0)
            throw GooFit::GeneralError("Was not able to implement param {} (error {})", var.getName(), err);

        if(var.IsFixed())
            FixParameter(counter);

        counter++;
    }

    pdfPointer->copyParams();
}

Member Function Documentation

Eval()

Int_t GooFit::Minuit1::Eval ( Int_t  npar, Double_t *  grad, Double_t &  fval, Double_t *  par, Int_t  flag  )

override

Fit function for Minuit.

Definition at line 42 of file FitManagerMinuit1.cpp.

References GooFit::PdfBase::calculateNLL(), GooFit::PdfBase::copyParams(), GOOFIT_TRACE, GOOFIT_WARN, GooFit::host_callnumber, and GooFit::max_index().

                                                                             {
    std::vector<double> pars{fp, fp + GetNumPars()};

    std::vector<double> gooPars;
    gooPars.resize(max_index(vars) + 1);

    for(Variable &var : vars) {
        if(std::isnan(pars.at(var.getFitterIndex())))
            GOOFIT_WARN("Variable {} at {} is NaN", var.getName(), var.getIndex());

        var.setChanged(var.getValue() != pars.at(var.getFitterIndex()));
        var.setValue(pars.at(var.getFitterIndex()));
        gooPars.at(var.getIndex()) = var.getValue() - var.getBlind(Variable::Key());
    }

    pdfPointer->copyParams(gooPars);

    GOOFIT_TRACE("Calculating NLL");
    fun = pdfPointer->calculateNLL();
    host_callnumber++;
    return 0;
}

getVaraibles()

std::vector<Variable> GooFit::Minuit1::getVaraibles ( ) const

inline

Definition at line 27 of file FitManagerMinuit1.h.

{ return vars; };

---

The documentation for this class was generated from the following files:

• /home/travis/build/GooFit/GooFit/include/goofit/fitting/FitManagerMinuit1.h
• /home/travis/build/GooFit/GooFit/src/goofit/FitManagerMinuit1.cpp