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digiovan |
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// -*- C++ -*-
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//
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// Package: FlatRandomDrop
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// Class: FlatRandomDrop
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//
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/**\class FlatRandomDrop FlatRandomDrop.cc UserArea/FlatRandomDrop/src/FlatRandomDrop.cc
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Description: [one line class summary]
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Implementation:
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[Notes on implementation]
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*/
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//
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// Original Author: Theodore Nicholas Kypreos,8 R-031,+41227675208,
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// Created: Mon Jun 14 19:03:27 CEST 2010
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// $Id$
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//
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//
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// system include files
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#include <memory>
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// user include files
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#include "FWCore/Framework/interface/Frameworkfwd.h"
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#include "FWCore/Framework/interface/EDFilter.h"
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#include "FWCore/Framework/interface/Event.h"
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#include "FWCore/Framework/interface/MakerMacros.h"
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#include "FWCore/ParameterSet/interface/ParameterSet.h"
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#include "TRandom3.h"
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//
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// class declaration
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//
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class FlatRandomDrop : public edm::EDFilter {
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public:
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explicit FlatRandomDrop(const edm::ParameterSet&);
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~FlatRandomDrop();
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private:
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virtual void beginJob() ;
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virtual bool filter(edm::Event&, const edm::EventSetup&);
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virtual void endJob() ;
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TRandom3* _rand3;
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int _numSeen;
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int _numDropped;
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double _pval;
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// ----------member data ---------------------------
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};
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//
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// constants, enums and typedefs
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//
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//
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// static data member definitions
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//
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//
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// constructors and destructor
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//
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FlatRandomDrop::FlatRandomDrop(const edm::ParameterSet& iConfig):_numSeen(0),_numDropped(0)
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{
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//now do what ever initialization is needed
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_rand3 = new TRandom3(0);
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_pval = iConfig.getParameter<double>("probKeep");
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std::cout<<"---FlatRandomDrop: initializing to keep "<<_pval*100.<<"% of events"<<std::endl;
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std::cout <<"If you are pre-scaling the data, you don't deserve to breathe and"<<std::endl
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<<"Cromm will rise up from the Earth to swallow your bones."<<std::endl;
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}
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FlatRandomDrop::~FlatRandomDrop()
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{
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_rand3->Delete();
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// do anything here that needs to be done at desctruction time
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// (e.g. close files, deallocate resources etc.)
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}
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//
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// member functions
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//
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// ------------ method called on each new Event ------------
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bool
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FlatRandomDrop::filter(edm::Event& iEvent, const edm::EventSetup& iSetup)
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{
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if (_pval >= 1) return true;
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double prob = _rand3->Rndm();
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++_numSeen;
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if (prob < _pval) return true;
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else {
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++_numDropped;
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return false;
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}
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/* {
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++_numDropped;
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return true;
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}else return false;
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*/
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/*
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using namespace edm;
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#ifdef THIS_IS_AN_EVENT_EXAMPLE
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Handle<ExampleData> pIn;
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iEvent.getByLabel("example",pIn);
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#endif
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#ifdef THIS_IS_AN_EVENTSETUP_EXAMPLE
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ESHandle<SetupData> pSetup;
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iSetup.get<SetupRecord>().get(pSetup);
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#endif
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return true;
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*/
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}
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// ------------ method called once each job just before starting event loop ------------
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void
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FlatRandomDrop::beginJob()
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{
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}
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// ------------ method called once each job just after ending the event loop ------------
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void
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FlatRandomDrop::endJob() {
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std::cout<<"-----FlatRandomDrop..."<<std::endl;
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if (_pval <1){
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std::cout<<"-------number of events seen: "<<_numSeen<<std::endl;
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std::cout<<"-------number of events rejected: "<<_numDropped<<std::endl;
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std::cout<<"-------rate of drop: "<<1.0*_numDropped/_numSeen<<std::endl;
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std::cout<<"-------number of events accepted: "<<_numSeen-_numDropped<<std::endl;
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std::cout<<"-------rate of accept: "<<(1.-1.0*_numDropped/_numSeen)<<std::endl;
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} else {
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std::cout<<"-----no flat-random filtering applied..."<<std::endl;
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}
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}
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//define this as a plug-in
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DEFINE_FWK_MODULE(FlatRandomDrop);
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