StringResolutionProvider Class Reference

Class to provide resolution factors for PAT candidates. More...

#include "PhysicsTools/PatAlgos/interface/StringResolutionProvider.h"

Inheritance diagram for StringResolutionProvider:

Public Types
typedef StringObjectFunction< reco::Candidate >	Function
	short cut within the common namespace More...

Public Member Functions
pat::CandKinResolution	getResolution (const reco::Candidate &cand) const override
	get a CandKinResolution object from the service More...
	StringResolutionProvider (const edm::ParameterSet &cfg)
	default constructor More...
	~StringResolutionProvider () override
	default destructor More...
Public Member Functions inherited from KinematicResolutionProvider
virtual	~KinematicResolutionProvider ()=default

Private Attributes
std::vector< std::string >	bins_
	a vector of strings for the binning More...
std::vector< pat::CandKinResolution::Scalar >	constraints_
std::vector< std::string >	funcEt_
	vectors for the resolution functions More...
std::vector< std::string >	funcEta_
std::vector< std::string >	funcPhi_
pat::CandKinResolution::Parametrization	parametrization_

Detailed Description

Class to provide resolution factors for PAT candidates.

A class to provide resolution functions for PAT candidates. The class is derived from the KinematicResolutionProvider class. It expects the following parameters:

parametrization : indicates the used representation (e.g. EtEtaPhi). This parameter is MANDATORY. resolutions : a vector of edm::ParameterSets, that contain the resolutions func- tionspotentially in multiple bins of a cetain parameter. For the default implementeation we have bins of reco::Candidate's eta in mind, though might be any kind of variable that is accessible as memeber function of reco::Candidate. This parameter is MANDATORY.

The edm::ParameterSets of the resolutions parameter are expected to be of form:

bin : Indicated the binning compatible with the StringCutObjectSelector. If omitted no binning is applied and the obtained resolution func- tions are assumed to be valid for all candidates. This parameter is OPTIONAL. et/eta/phi : Contain the parametrization in et if working in the EtEtaPhi pa- rametrization. These parameters are OPTIONAL. They are expected to be present in the et/eta/phi representation though. constraint : adding further information on constraints. It needs to investigated further what the meaning of this parameter exactly is before we can decide about its future. This parameter is OPTIONAL.

We expect that cfi files of this form will be generated automatically. edm::ParameterSets for other represenations will be implemented on request.

Definition at line 43 of file StringResolutionProvider.h.

Member Typedef Documentation

Function

typedef StringObjectFunction<reco::Candidate> StringResolutionProvider::Function

short cut within the common namespace

Definition at line 46 of file StringResolutionProvider.h.

Constructor & Destructor Documentation

StringResolutionProvider()

StringResolutionProvider::StringResolutionProvider

(

const edm::ParameterSet &

cfg

)

default constructor

Definition at line 8 of file StringResolutionProvider.cc.

References bins_, looper::cfg, constraints_, Exception, pat::helper::ParametrizationHelper::fromString(), funcEt_, funcEta_, funcPhi_, stringResolutionProvider_cfi::parametrization, parametrization_, and AlCaHLTBitMon_QueryRunRegistry::string.

                                                                             : constraints_() {
  typedef pat::CandKinResolution::Parametrization Parametrization;

  //
  std::vector<double> constr = cfg.getParameter<std::vector<double> >("constraints");
  constraints_.insert(constraints_.end(), constr.begin(), constr.end());

  std::string parametrization(cfg.getParameter<std::string>("parametrization"));
  parametrization_ = pat::helper::ParametrizationHelper::fromString(parametrization);

  std::vector<edm::ParameterSet> functionSets_ = cfg.getParameter<std::vector<edm::ParameterSet> >("functions");
  for (std::vector<edm::ParameterSet>::const_iterator iSet = functionSets_.begin(); iSet != functionSets_.end();
       ++iSet) {
    if (iSet->exists("bin"))
      bins_.push_back(iSet->getParameter<std::string>("bin"));
    else if (functionSets_.size() == 1)
      bins_.push_back("");
    else
      throw cms::Exception("WrongConfig") << "Parameter 'bin' is needed if more than one PSet is specified\n";

    funcEt_.push_back(iSet->getParameter<std::string>("et"));
    funcEta_.push_back(iSet->getParameter<std::string>("eta"));
    funcPhi_.push_back(iSet->getParameter<std::string>("phi"));
  }
}

~StringResolutionProvider()

StringResolutionProvider::~StringResolutionProvider ( )

override

default destructor

Definition at line 34 of file StringResolutionProvider.cc.

{}

Member Function Documentation

getResolution()

pat::CandKinResolution StringResolutionProvider::getResolution ( const reco::Candidate &  cand ) const

overridevirtual

get a CandKinResolution object from the service

Implements KinematicResolutionProvider.

Definition at line 36 of file StringResolutionProvider.cc.

References bins_, constraints_, funcEt_, funcEta_, funcPhi_, mps_fire::i, parametrization_, and HGCalGeometryMode::Square.

                                                                                            {
  int selectedBin = -1;
  for (unsigned int i = 0; i < bins_.size(); ++i) {
    StringCutObjectSelector<reco::Candidate> select_(bins_[i]);
    if (select_(cand)) {
      selectedBin = i;
      break;
    }
  }
  std::vector<pat::CandKinResolution::Scalar> covariances(3);
  if (selectedBin >= 0) {
    covariances[0] = ROOT::Math::Square(Function(funcEt_[selectedBin]).operator()(cand));
    covariances[1] = ROOT::Math::Square(Function(funcEta_[selectedBin]).operator()(cand));
    covariances[2] = ROOT::Math::Square(Function(funcPhi_[selectedBin]).operator()(cand));
  }
  // fill 0. for not selected candidates
  else
    for (int i = 0; i < 3; ++i) {
      covariances[i] = 0.;
    }

  return pat::CandKinResolution(parametrization_, covariances, constraints_);
}

Member Data Documentation

bins_

std::vector<std::string> StringResolutionProvider::bins_

private

a vector of strings for the binning

Definition at line 63 of file StringResolutionProvider.h.

Referenced by getResolution(), and StringResolutionProvider().

constraints_

std::vector<pat::CandKinResolution::Scalar> StringResolutionProvider::constraints_

private

a vector of constrtaints for the CanKinResolution object

Definition at line 58 of file StringResolutionProvider.h.

Referenced by getResolution(), and StringResolutionProvider().

funcEt_

std::vector<std::string> StringResolutionProvider::funcEt_

private

vectors for the resolution functions

Definition at line 65 of file StringResolutionProvider.h.

Referenced by getResolution(), and StringResolutionProvider().

funcEta_

std::vector<std::string> StringResolutionProvider::funcEta_

private

Definition at line 65 of file StringResolutionProvider.h.

Referenced by getResolution(), and StringResolutionProvider().

funcPhi_

std::vector<std::string> StringResolutionProvider::funcPhi_

private

Definition at line 65 of file StringResolutionProvider.h.

Referenced by getResolution(), and StringResolutionProvider().

parametrization_

pat::CandKinResolution::Parametrization StringResolutionProvider::parametrization_

private

a parametrization for the CanKinResolution object (this needs an extension)

Definition at line 61 of file StringResolutionProvider.h.

Referenced by getResolution(), and StringResolutionProvider().