#include <RootMinuit.h>

Public Member Functions
void	addParameter (const std::string &name, boost::shared_ptr< double > val, double err, double min, double max)

void	addParameter (const funct::Parameter &par, double err, double min, double max)

void	fixParameter (const std::string &name)

template<unsigned int N>
void	getErrorMatrix (ROOT::Math::SMatrix< double, N, N, ROOT::Math::MatRepSym< double, N > > &err)

double	getParameter (const std::string &name, double &err)

double	getParameter (const std::string &name)

double	getParameterError (const std::string &name, double &val)

double	getParameterError (const std::string &name)

double	migrad ()

double	minimize ()

double	minValue ()

int	numberOfFreeParameters ()

int	numberOfParameters ()

void	printFitResults (std::ostream &cout=std::cout)

void	printParameters (std::ostream &cout=std::cout)

void	releaseParameter (const std::string &name)

	RootMinuit (Function f, bool verbose=false)

void	setParameter (const std::string &name, double val)

void	setParameters ()

Private Member Functions
void	init ()

size_t	parameterIndex (const std::string &name) const

Static Private Member Functions
static void	fcn_ (int &, double , double &f, double par, int)

Private Attributes
bool	initialized_

std::auto_ptr< TMinuit >	minuit_

double	minValue_

std::map< std::string, size_t >	parIndices_

parameterVector_t	parMap_

std::vector< boost::shared_ptr < double > >	pars_

bool	verbose_

Static Private Attributes
static Function	f_

static std::vector < boost::shared_ptr< double > > *	fPars_ = 0

Detailed Description

template<class Function>
class fit::RootMinuit< Function >

Definition at line 21 of file RootMinuit.h.

Constructor & Destructor Documentation

template<class Function>

fit::RootMinuit< Function >::RootMinuit	(	Function	f,
		bool	verbose = `false`
	)

inline

Definition at line 23 of file RootMinuit.h.

References f, and fit::RootMinuit< Function >::f_.

                                                  : 
       initialized_(false), minValue_(0), verbose_(verbose) { 
       f_ = f;
     }

Member Function Documentation

template<class Function>

void fit::RootMinuit< Function >::addParameter	(	const std::string &	name,
		boost::shared_ptr< double >	val,
		double	err,
		double	min,
		double	max
	)

inline

Definition at line 27 of file RootMinuit.h.

References edm::errors::Configuration, fit::parameter_t::err, edm::hlt::Exception, fit::parameter_t::fixed, fit::RootMinuit< Function >::initialized_, max(), fit::parameter_t::max, fit::parameter_t::min, min, mergeVDriftHistosByStation::name, fit::RootMinuit< Function >::parIndices_, fit::RootMinuit< Function >::parMap_, fit::RootMinuit< Function >::pars_, alignCSCRings::s, and fit::parameter_t::val.

Referenced by editorTools.UserCodeTool::__init__(), electronTools.AddElectronUserIsolation::__init__(), photonTools.AddPhotonUserIsolation::__init__(), metTools.AddTcMET::__init__(), muonTools.AddMuonUserIsolation::__init__(), trackTools.MakeAODTrackCandidates::__init__(), HiCoreTools.RestrictInputToAOD::__init__(), coreTools.RestrictInputToAOD::__init__(), metUncertaintyTools.RunMEtUncertainties::__init__(), cmsswVersionTools.Run52xOn51xTrigger::__init__(), Vispa.Plugins.ConfigEditor.ToolDataAccessor.ImportTool::__init__(), editorTools.ChangeSource::__init__(), HiCoreTools.RemoveMCMatching::__init__(), metTools.AddPfMET::__init__(), coreTools.RunOnData::__init__(), trackTools.MakePATTrackCandidates::__init__(), trigTools.SwitchOnTrigger::__init__(), cmsswVersionTools.PickRelValInputFiles::__init__(), coreTools.RemoveMCMatching::__init__(), HiCoreTools.RemoveAllPATObjectsBut::__init__(), jetTools.RunBTagging::__init__(), HiCoreTools.RemoveSpecificPATObjects::__init__(), trigTools.SwitchOnTriggerStandAlone::__init__(), trackTools.MakeTrackCandidates::__init__(), coreTools.RemoveAllPATObjectsBut::__init__(), coreTools.RemoveSpecificPATObjects::__init__(), HiCoreTools.RemoveCleaning::__init__(), trigTools.SwitchOnTriggerMatching::__init__(), HiCoreTools.AddCleaning::__init__(), tauTools.AddTauCollection::__init__(), coreTools.RemoveCleaning::__init__(), trigTools.SwitchOnTriggerMatchingStandAlone::__init__(), coreTools.AddCleaning::__init__(), jetTools.AddJetCollection::__init__(), trigTools.SwitchOnTriggerMatchEmbedding::__init__(), trigTools.RemoveCleaningFromTriggerMatching::__init__(), jetTools.SwitchJetCollection::__init__(), jetTools.AddJetID::__init__(), jetTools.SetTagInfos::__init__(), jetTools.SwitchJetCorrLevels::__init__(), fit::RootMinuitCommands< Function >::add(), and fit::RootMinuit< Function >::addParameter().

                                                                                                                {
       if(initialized_)
     throw edm::Exception(edm::errors::Configuration)
       << "RootMinuit: can't add parameter " << name 
       << " after minuit initialization\n";      
       pars_.push_back(val);
       parameter_t par;
       par.val = *val;
       par.err = err;
       par.min = min;
       par.max = max;
       par.fixed = false;
       parMap_.push_back(std::make_pair(name, par));
       size_t s = parIndices_.size();
       parIndices_[name] = s;
     }

template<class Function>

void fit::RootMinuit< Function >::addParameter	(	const funct::Parameter &	par,
		double	err,
		double	min,
		double	max
	)

inline

Definition at line 43 of file RootMinuit.h.

References fit::RootMinuit< Function >::addParameter(), max(), min, and funct::Parameter::name().

Referenced by editorTools.UserCodeTool::__init__(), electronTools.AddElectronUserIsolation::__init__(), photonTools.AddPhotonUserIsolation::__init__(), metTools.AddTcMET::__init__(), muonTools.AddMuonUserIsolation::__init__(), trackTools.MakeAODTrackCandidates::__init__(), HiCoreTools.RestrictInputToAOD::__init__(), coreTools.RestrictInputToAOD::__init__(), metUncertaintyTools.RunMEtUncertainties::__init__(), cmsswVersionTools.Run52xOn51xTrigger::__init__(), Vispa.Plugins.ConfigEditor.ToolDataAccessor.ImportTool::__init__(), editorTools.ChangeSource::__init__(), HiCoreTools.RemoveMCMatching::__init__(), metTools.AddPfMET::__init__(), coreTools.RunOnData::__init__(), trackTools.MakePATTrackCandidates::__init__(), trigTools.SwitchOnTrigger::__init__(), cmsswVersionTools.PickRelValInputFiles::__init__(), coreTools.RemoveMCMatching::__init__(), HiCoreTools.RemoveAllPATObjectsBut::__init__(), jetTools.RunBTagging::__init__(), HiCoreTools.RemoveSpecificPATObjects::__init__(), trigTools.SwitchOnTriggerStandAlone::__init__(), trackTools.MakeTrackCandidates::__init__(), coreTools.RemoveAllPATObjectsBut::__init__(), coreTools.RemoveSpecificPATObjects::__init__(), HiCoreTools.RemoveCleaning::__init__(), trigTools.SwitchOnTriggerMatching::__init__(), HiCoreTools.AddCleaning::__init__(), tauTools.AddTauCollection::__init__(), coreTools.RemoveCleaning::__init__(), trigTools.SwitchOnTriggerMatchingStandAlone::__init__(), coreTools.AddCleaning::__init__(), jetTools.AddJetCollection::__init__(), trigTools.SwitchOnTriggerMatchEmbedding::__init__(), trigTools.RemoveCleaningFromTriggerMatching::__init__(), jetTools.SwitchJetCollection::__init__(), jetTools.AddJetID::__init__(), jetTools.SetTagInfos::__init__(), and jetTools.SwitchJetCorrLevels::__init__().

                                                                                       {
       return addParameter(par.name(), par, err, min, max);
     }

template<class Function>

static void fit::RootMinuit< Function >::fcn_	(	int &	,
		double *	,
		double &	f,
		double *	par,
		int
	)

inlinestaticprivate

Definition at line 189 of file RootMinuit.h.

References fit::RootMinuitFuncEvaluator< Function >::evaluate(), fit::RootMinuit< Function >::f_, fit::RootMinuit< Function >::fPars_, i, and findQualityFiles::size.

Referenced by fit::RootMinuit< Function >::init().

                                                                    {
       size_t size = fPars_->size();
       for(size_t i = 0; i < size; ++i) 
     *((*fPars_)[i]) = par[i];
       f = RootMinuitFuncEvaluator<Function>::evaluate(f_);
     }

template<class Function>

void fit::RootMinuit< Function >::fixParameter ( const std::string & name )

inline

Definition at line 87 of file RootMinuit.h.

References i, fit::RootMinuit< Function >::initialized_, fit::RootMinuit< Function >::minuit_, fit::RootMinuit< Function >::parameterIndex(), and fit::RootMinuit< Function >::parMap_.

Referenced by fit::RootMinuitCommands< Function >::add(), and fit::RootMinuitCommands< Function >::run().

                                               {
       size_t i = parameterIndex(name);
       parMap_[i].second.fixed = true;
       if(initialized_) {
     minuit_->FixParameter(i);
       }
     }

template<class Function>

template<unsigned int N>

void fit::RootMinuit< Function >::getErrorMatrix ( ROOT::Math::SMatrix< double, N, N, ROOT::Math::MatRepSym< double, N > > & err )

inline

Definition at line 71 of file RootMinuit.h.

References edm::errors::Configuration, alignCSCRings::e, edm::hlt::Exception, i, fit::RootMinuit< Function >::init(), j, fit::RootMinuit< Function >::minuit_, N, fit::RootMinuit< Function >::numberOfParameters(), and fit::RootMinuit< Function >::setParameters().

                                                                                             {
       init();
       if(N != numberOfParameters())
     throw edm::Exception(edm::errors::Configuration)
       << "RootMinuit: can't call getErrorMatrix passing an SMatrix of dimension " << N
       << " while the number of parameters is " << numberOfParameters() << "\n";
       double * e = new double[N*N];
       minuit_->mnemat(e, numberOfParameters());
       for(size_t i = 0; i < N; ++i) {
     for(size_t j = 0; j <= i; ++j) {
       err(i, j) = e[i + N*j];
     }
       }
       delete [] e;
       setParameters();
     }

template<class Function>

double fit::RootMinuit< Function >::getParameter	(	const std::string &	name,
		double &	err
	)

inline

Definition at line 46 of file RootMinuit.h.

References fit::RootMinuit< Function >::init(), fit::RootMinuit< Function >::minuit_, and fit::RootMinuit< Function >::parameterIndex().

                                                               {
       double val;
       init();
       minuit_->GetParameter(parameterIndex(name), val, err);
       return val;
     }

template<class Function>

double fit::RootMinuit< Function >::getParameter ( const std::string & name )

inline

Definition at line 52 of file RootMinuit.h.

References fit::RootMinuit< Function >::init(), fit::RootMinuit< Function >::minuit_, and fit::RootMinuit< Function >::parameterIndex().

                                                 {
       double val, err;
       init();
       minuit_->GetParameter(parameterIndex(name), val, err);
       return val;
     }

template<class Function>

double fit::RootMinuit< Function >::getParameterError	(	const std::string &	name,
		double &	val
	)

inline

Definition at line 58 of file RootMinuit.h.

References fit::RootMinuit< Function >::init(), fit::RootMinuit< Function >::minuit_, and fit::RootMinuit< Function >::parameterIndex().

Referenced by fit::RootMinuit< Function >::printParameters().

                                                                    {
       double err;
       init();
       minuit_->GetParameter(parameterIndex(name), val, err);
       return err;
     }

template<class Function>

double fit::RootMinuit< Function >::getParameterError ( const std::string & name )

inline

Definition at line 64 of file RootMinuit.h.

References fit::RootMinuit< Function >::init(), fit::RootMinuit< Function >::minuit_, and fit::RootMinuit< Function >::parameterIndex().

                                                      {
       double val, err;
       init();
       minuit_->GetParameter(parameterIndex(name), val, err);
       return err;
     }

template<class Function>

void fit::RootMinuit< Function >::init ( void )

inlineprivate

Definition at line 202 of file RootMinuit.h.

References fitWZ::arglist, edm::errors::Configuration, end, fit::parameter_t::err, edm::hlt::Exception, fit::RootMinuit< Function >::fcn_(), fit::RootMinuit< Function >::fPars_, i, fit::RootMinuit< Function >::initialized_, fit::parameter_t::max, fit::parameter_t::min, fit::RootMinuit< Function >::minuit_, mergeVDriftHistosByStation::name, AlCaHLTBitMon_ParallelJobs::p, fit::RootMinuit< Function >::parMap_, fit::RootMinuit< Function >::pars_, fit::parameter_t::val, and fit::RootMinuit< Function >::verbose_.

Referenced by fit::RootMinuit< Function >::getErrorMatrix(), fit::RootMinuit< Function >::getParameter(), fit::RootMinuit< Function >::getParameterError(), fit::RootMinuit< Function >::migrad(), fit::RootMinuit< Function >::minimize(), fit::RootMinuit< Function >::minValue(), fit::RootMinuit< Function >::numberOfFreeParameters(), and fit::RootMinuit< Function >::numberOfParameters().

                 {
       if(initialized_) return;
       minuit_.reset(new TMinuit(parMap_.size()));
       double arglist[10];
       int ierflg = 0;      
       if (! verbose_) {
     arglist[0] = -1;
     minuit_->mnexcm("SET PRINT", arglist, 1, ierflg); 
     if (ierflg != 0) 
       throw edm::Exception(edm::errors::Configuration)
         << "RootMinuit: error in calling SET PRINT\n";
       }     
       arglist[0] = 1;
       minuit_->mnexcm("SET ERR", arglist, 1, ierflg);
       if (ierflg != 0) 
     throw edm::Exception(edm::errors::Configuration)
       << "RootMinuit: error in calling SET ERR\n";
 
       size_t i = 0;
       typename parameterVector_t::const_iterator p = parMap_.begin(), end = parMap_.end();
       for(; p != end; ++p, ++i) {
     const std::string & name = p->first;
     const parameter_t & par = p->second;
     minuit_->mnparm(i, name, par.val, par.err, par.min, par.max, ierflg);
     if(ierflg != 0)
       throw edm::Exception(edm::errors::Configuration)
         << "RootMinuit: error in setting parameter " << i 
         << " value = " << par.val << " error = " << par.err
         << " range = [" << par.min << ", " << par.max << "]\n";
       }
       initialized_ = true;
       for(i = 0, p = parMap_.begin(); p != end; ++p, ++i)
     if(p->second.fixed)
       minuit_->FixParameter(i);
       fPars_= & pars_; 
       minuit_->SetFCN(fcn_);
     }

template<class Function>

double fit::RootMinuit< Function >::migrad ( )

inline

Definition at line 146 of file RootMinuit.h.

References fitWZ::arglist, dtNoiseDBValidation_cfg::cerr, fit::RootMinuit< Function >::init(), m, fit::RootMinuit< Function >::minuit_, fit::RootMinuit< Function >::minValue(), fit::RootMinuit< Function >::setParameters(), and fit::RootMinuit< Function >::verbose_.

Referenced by fit::RootMinuitCommands< Function >::run().

                     {
       init();
       double arglist[10];
       arglist[0] = 5000;
       arglist[1] = 0.1;
       int ierflag;
       minuit_->mnexcm("MIGRAD", arglist, 2, ierflag);
       if ( ierflag != 0 ) std::cerr << "ERROR in migrad!!" << std::endl;
       if(verbose_) minuit_->mnmatu(1); //Prints the covariance matrix
       double m = minValue();
       if(verbose_) minuit_->mnprin(3, m);
       setParameters();
       return m;
     }

template<class Function>

double fit::RootMinuit< Function >::minimize ( )

inline

Definition at line 132 of file RootMinuit.h.

References fitWZ::arglist, dtNoiseDBValidation_cfg::cerr, fit::RootMinuit< Function >::init(), m, fit::RootMinuit< Function >::minuit_, fit::RootMinuit< Function >::minValue(), fit::RootMinuit< Function >::setParameters(), and fit::RootMinuit< Function >::verbose_.

Referenced by fit::RootMinuitCommands< Function >::run().

                       {
       init();
       double arglist[10];
       arglist[0] = 5000;
       arglist[1] = 0.1;
       int ierflag;
       minuit_->mnexcm("MINIMIZE", arglist, 2, ierflag);
       if ( ierflag != 0 ) std::cerr << "ERROR in minimize!!" << std::endl;
       if(verbose_) minuit_->mnmatu(1); //Prints the covariance matrix
       double m = minValue();
       if(verbose_) minuit_->mnprin(3, m);
       setParameters();
       return m;
     }

template<class Function>

double fit::RootMinuit< Function >::minValue ( )

inline

Definition at line 160 of file RootMinuit.h.

References fit::RootMinuit< Function >::init(), fit::RootMinuit< Function >::minuit_, and fit::RootMinuit< Function >::minValue_.

Referenced by fit::RootMinuit< Function >::migrad(), fit::RootMinuit< Function >::minimize(), and fit::RootMinuit< Function >::printFitResults().

                       {
       init();
       int ierflag;
       double edm, errdef;
       int nvpar, nparx;
       minuit_->mnstat(minValue_, edm, errdef, nvpar, nparx, ierflag);
       return minValue_;
     }

template<class Function>

int fit::RootMinuit< Function >::numberOfFreeParameters ( )

inline

Definition at line 128 of file RootMinuit.h.

References fit::RootMinuit< Function >::init(), and fit::RootMinuit< Function >::minuit_.

Referenced by fit::RootMinuit< Function >::printFitResults().

                                  { 
       init();
       return minuit_->GetNumFreePars();
     }

template<class Function>

int fit::RootMinuit< Function >::numberOfParameters ( )

inline

Definition at line 124 of file RootMinuit.h.

References fit::RootMinuit< Function >::init(), and fit::RootMinuit< Function >::minuit_.

Referenced by fit::RootMinuit< Function >::getErrorMatrix().

                              { 
       init();
       return minuit_->GetNumPars();
     }

template<class Function>

size_t fit::RootMinuit< Function >::parameterIndex ( const std::string & name ) const

inlineprivate

Definition at line 195 of file RootMinuit.h.

References edm::errors::Configuration, AlCaHLTBitMon_ParallelJobs::p, and fit::RootMinuit< Function >::parIndices_.

Referenced by fit::RootMinuit< Function >::fixParameter(), fit::RootMinuit< Function >::getParameter(), fit::RootMinuit< Function >::getParameterError(), fit::RootMinuit< Function >::releaseParameter(), and fit::RootMinuit< Function >::setParameter().

                                                        {
       typename std::map<std::string, size_t>::const_iterator p = parIndices_.find(name);
       if(p == parIndices_.end())
     throw edm::Exception(edm::errors::Configuration)
       << "RootMinuit: can't find parameter " << name << "\n";
       return p->second;
     }

template<class Function>

void fit::RootMinuit< Function >::printFitResults ( std::ostream & cout = std::cout )

inline

Definition at line 175 of file RootMinuit.h.

References gather_cfg::cout, fit::RootMinuit< Function >::f_, fit::RootMinuit< Function >::minValue(), fit::RootMinuit< Function >::numberOfFreeParameters(), fit::RootMinuitResultPrinter< Function >::print(), and fit::RootMinuit< Function >::printParameters().

Referenced by fit::RootMinuitCommands< Function >::run().

                                                      {
       RootMinuitResultPrinter<Function>::print(minValue(), numberOfFreeParameters(), f_);
       printParameters(cout);
     }

template<class Function>

void fit::RootMinuit< Function >::printParameters ( std::ostream & cout = std::cout )

inline

Definition at line 168 of file RootMinuit.h.

References gather_cfg::cout, end, fit::RootMinuit< Function >::getParameterError(), i, fit::RootMinuit< Function >::parIndices_, and fit::RootMinuit< Function >::pars_.

Referenced by fit::RootMinuit< Function >::printFitResults().

                                                      {
       std::map<std::string, size_t>::const_iterator i = parIndices_.begin(), end = parIndices_.end();
       for(; i != end; ++i) {
     cout << i->first << " = " << *pars_[i->second] 
          << " +/- " << getParameterError(i->first) << std::endl;
       }
     }

template<class Function>

void fit::RootMinuit< Function >::releaseParameter ( const std::string & name )

inline

Definition at line 94 of file RootMinuit.h.

References i, fit::RootMinuit< Function >::initialized_, fit::RootMinuit< Function >::minuit_, fit::RootMinuit< Function >::parameterIndex(), and fit::RootMinuit< Function >::parMap_.

Referenced by fit::RootMinuitCommands< Function >::run().

                                                   {
       size_t i = parameterIndex(name);
       parMap_[i].second.fixed = false;
       if(initialized_) {
     minuit_->Release(i);
       }
     }

template<class Function>

void fit::RootMinuit< Function >::setParameter	(	const std::string &	name,
		double	val
	)

inline

Definition at line 101 of file RootMinuit.h.

References edm::errors::Configuration, fit::parameter_t::err, edm::hlt::Exception, i, fit::RootMinuit< Function >::initialized_, fit::parameter_t::max, fit::parameter_t::min, fit::RootMinuit< Function >::minuit_, fit::RootMinuit< Function >::parameterIndex(), fit::RootMinuit< Function >::parMap_, and fit::parameter_t::val.

Referenced by electronTools.AddElectronUserIsolation::__call__(), photonTools.AddPhotonUserIsolation::__call__(), metTools.AddTcMET::__call__(), muonTools.AddMuonUserIsolation::__call__(), editorTools.UserCodeTool::__call__(), HiCoreTools.RestrictInputToAOD::__call__(), coreTools.RestrictInputToAOD::__call__(), trackTools.MakeAODTrackCandidates::__call__(), cmsswVersionTools.Run52xOn51xTrigger::__call__(), editorTools.ChangeSource::__call__(), metTools.AddPfMET::__call__(), HiCoreTools.RemoveMCMatching::__call__(), coreTools.RunOnData::__call__(), trackTools.MakePATTrackCandidates::__call__(), trigTools.SwitchOnTrigger::__call__(), cmsswVersionTools.PickRelValInputFiles::__call__(), coreTools.RemoveMCMatching::__call__(), HiCoreTools.RemoveAllPATObjectsBut::__call__(), jetTools.RunBTagging::__call__(), HiCoreTools.RemoveSpecificPATObjects::__call__(), trigTools.SwitchOnTriggerStandAlone::__call__(), coreTools.RemoveAllPATObjectsBut::__call__(), trackTools.MakeTrackCandidates::__call__(), coreTools.RemoveSpecificPATObjects::__call__(), HiCoreTools.RemoveCleaning::__call__(), trigTools.SwitchOnTriggerMatching::__call__(), HiCoreTools.AddCleaning::__call__(), coreTools.RemoveCleaning::__call__(), tauTools.AddTauCollection::__call__(), trigTools.SwitchOnTriggerMatchingStandAlone::__call__(), coreTools.AddCleaning::__call__(), jetTools.AddJetCollection::__call__(), trigTools.SwitchOnTriggerMatchEmbedding::__call__(), trigTools.RemoveCleaningFromTriggerMatching::__call__(), jetTools.SwitchJetCollection::__call__(), jetTools.AddJetID::__call__(), metUncertaintyTools.RunMEtUncertainties::__call__(), jetTools.SetTagInfos::__call__(), jetTools.SwitchJetCorrLevels::__call__(), and fit::RootMinuitCommands< Function >::run().

                                                           {
       size_t i = parameterIndex(name);
       parameter_t & par = parMap_[i].second;
       par.val = val;
       if(initialized_) {
     int ierflg = 0;      
     minuit_->mnparm(i, name, par.val, par.err, par.min, par.max, ierflg);
     if(ierflg != 0)
       throw edm::Exception(edm::errors::Configuration)
         << "RootMinuit: error in setting parameter " << i 
         << " value = " << par.val << " error = " << par.err
         << " range = [" << par.min << ", " << par.max << "]\n";
       }
     }

template<class Function>

void fit::RootMinuit< Function >::setParameters ( )

inline

Definition at line 115 of file RootMinuit.h.

References end, i, getHLTprescales::index, fit::RootMinuit< Function >::minuit_, fit::RootMinuit< Function >::parIndices_, and fit::RootMinuit< Function >::pars_.

Referenced by fit::RootMinuit< Function >::getErrorMatrix(), fit::RootMinuit< Function >::migrad(), and fit::RootMinuit< Function >::minimize().

                          {
       std::map<std::string, size_t>::const_iterator i = parIndices_.begin(), end = parIndices_.end();
       double val, err;
       for(; i != end; ++i) {
     size_t index = i->second;
     minuit_->GetParameter(index, val, err);
     *pars_[index] = val;
       }
     }