CMSSW collection accessors

Whenever I access a new collection I try to save the syntax for accessing it and its variables here for future reference. I try to add some info about the collection or link the twiki/web page containing the desired info from the original group / author.

CMSSW 1_5_2

SimTracks

Taken from http://cmssw.cvs.cern.ch/cgi-bin/cmssw.cgi/CMSSW/Validation/RecoVertex/src/TrackParameterAnalyzer.cc?revision=1.10&view=markup

cfg file

InputTag simG4 = g4SimHits

include

Too many... will remove some.

//generator level
#include "SimDataFormats/HepMCProduct/interface/HepMCProduct.h"
#include "HepMC/GenEvent.h"
#include "HepMC/GenVertex.h"
#include "HepMC/GenParticle.h"
 
// simulated vertices,..., add <use name=SimDataFormats/Vertex> and <../Track>
#include <SimDataFormats/Track/interface/SimTrack.h>
#include <SimDataFormats/Track/interface/SimTrackContainer.h>
#include "SimGeneral/HepPDTRecord/interface/ParticleDataTable.h"

BuildFile

yes

code

simG4_( iConfig.getParameter<edm::InputTag>( "simG4" ) )

     // get the simulated tracks, extract perigee parameters
   Handle<SimTrackContainer> simTrks;
   iEvent.getByLabel( simG4_, simTrks);
   
   std::vector<ParameterVector > tsim;
   for(edm::SimTrackContainer::const_iterator t=simTrks->begin(); t!=simTrks->end(); ++t){
       int pdgCode=t->type();

    HepLorentzVector p=t->momentum();
    if(verbose_){
      std::cout << "simtrk "
             << " gen=" << std::setw( 4) << t->genpartIndex()
             << " vtx=" << std::setw( 4) << t->vertIndex() 
             << " pdg=" << std::setw( 5) << t->type() 
             << " Q="   << std::setw( 3) << Q 
             << " pt="  << std::setw(6) << p.perp()
             << " vx="  << std::setw(6) << v.x() 
             << " vy="  << std::setw(6) << v.y() 
             << " vz="  << std::setw(6) << v.z()
             << std::endl;
    }
}

Another 2nd

another 2nd

3rd

3rd

4th

4th

a link

my fnal page

a currently broken picture link

-- IngoBloch - 15 Aug 2007