genie::rew::GReWeight Class Reference

Interface to the GENIE event reweighting engines. More...

#include <GReWeight.h>

Public Member Functions
	GReWeight ()
	~GReWeight ()
void	AdoptWghtCalc (string name, GReWeightI *wcalc)
	add concrete weight calculator, transfers ownership More...
GReWeightI *	WghtCalc (string name)
	access a weight calculator by name More...
GSystSet &	Systematics (void)
	set of enabled systematic params & values More...
void	Reconfigure (void)
	reconfigure weight calculators with new params More...
double	CalcWeight (const genie::EventRecord &event)
	calculate weight for input event More...
void	Print (void)
	print More...

Private Member Functions
void	CleanUp (void)

Private Attributes
GSystSet	fSystSet
	set of enabled nuisance parameters More...
map< string, GReWeightI * >	fWghtCalc
	concrete weight calculators More...

Detailed Description

Interface to the GENIE event reweighting engines.

Author

Jim Dobson <J.Dobson07 imperial.ac.uk> Imperial College London

Costas Andreopoulos <costas.andreopoulos stfc.ac.uk> University of Liverpool & STFC Rutherford Appleton Lab

Aug 1, 2009

Copyright (c) 2003-2017, GENIE Neutrino MC Generator Collaboration For the full text of the license visit http://copyright.genie-mc.org or see $GENIE/LICENSE

Definition at line 40 of file GReWeight.h.

Constructor & Destructor Documentation

GReWeight::GReWeight

(

)

Definition at line 43 of file GReWeight.cxx.

{
  // Disable cacheing that interferes with event reweighting
  RunOpt::Instance()->EnableBareXSecPreCalc(false);
}

GReWeight::~GReWeight

(

)

Definition at line 49 of file GReWeight.cxx.

{
  this->CleanUp();
}

Member Function Documentation

void GReWeight::AdoptWghtCalc	(	string	name,
		GReWeightI *	wcalc
	)

add concrete weight calculator, transfers ownership

Definition at line 54 of file GReWeight.cxx.

{
  if(!wcalc) return;

  fWghtCalc.insert(map<string, GReWeightI*>::value_type(name,wcalc));
}

double GReWeight::CalcWeight

(

const genie::EventRecord &

event

)

calculate weight for input event

Definition at line 99 of file GReWeight.cxx.

{
// calculate weight for all tweaked physics parameters
//
  double weight = 1.0;
  map<string, GReWeightI *>::iterator it = fWghtCalc.begin();
  for( ; it != fWghtCalc.end(); ++it) {
    GReWeightI * wcalc = it->second;
    double w = wcalc->CalcWeight(event); 
    LOG("ReW", pNOTICE) 
       << "Calculator: " << it->first << " => wght = " << w;    
    weight *= w;
  }
  return weight;
}

void GReWeight::CleanUp ( void  )

private

Definition at line 115 of file GReWeight.cxx.

{
  map<string, GReWeightI *>::iterator it = fWghtCalc.begin();
  for( ; it != fWghtCalc.end(); ++it) {
    GReWeightI * rw = it->second;
    if(rw) {
      delete rw;
      rw=0;
    }
  }
  fWghtCalc.clear();
}

void GReWeight::Print

(

void

)

print

Definition at line 128 of file GReWeight.cxx.

{
  vector<genie::rew::GSyst_t> syst_vec = this->Systematics().AllIncluded();
  int vec_size = syst_vec.size();

  LOG("ReW", pNOTICE) << "Current set of systematic params:";   
  for(int i = 0 ; i < vec_size ; i ++){
     LOG("ReW", pNOTICE) 
        << " --o "  << GSyst::AsString(syst_vec[i])
        << " is set at " << this->Systematics().Info(syst_vec[i])->CurValue;
  }                             
}

void GReWeight::Reconfigure

(

void

)

reconfigure weight calculators with new params

Definition at line 74 of file GReWeight.cxx.

{
  LOG("ReW", pNOTICE) << "Reconfiguring ...";

  vector<genie::rew::GSyst_t> svec = fSystSet.AllIncluded();

  map<string, GReWeightI *>::iterator it = fWghtCalc.begin();
  for( ; it != fWghtCalc.end(); ++it) {

      GReWeightI * wcalc = it->second;

      vector<genie::rew::GSyst_t>::const_iterator parm_iter = svec.begin();
      for( ; parm_iter != svec.end(); ++parm_iter) {
          GSyst_t syst = *parm_iter;
          double val = fSystSet.Info(syst)->CurValue;
          wcalc->SetSystematic(syst, val);
      }//params

      wcalc->Reconfigure();

  }//weight calculators

  LOG("ReW", pDEBUG) << "Done reconfiguring";
}

GSystSet & GReWeight::Systematics

(

void

)

set of enabled systematic params & values

Definition at line 69 of file GReWeight.cxx.

{ 
  return fSystSet; 
}

GReWeightI * GReWeight::WghtCalc

(

string

name

)

access a weight calculator by name

Definition at line 61 of file GReWeight.cxx.

{ 
  map<string, GReWeightI*>::iterator iter = fWghtCalc.find(name);
  if(iter != fWghtCalc.end()) return iter->second;
  
  return 0;
}

Member Data Documentation

GSystSet genie::rew::GReWeight::fSystSet

private

set of enabled nuisance parameters

Definition at line 57 of file GReWeight.h.

map<string, GReWeightI *> genie::rew::GReWeight::fWghtCalc

private

concrete weight calculators

Definition at line 58 of file GReWeight.h.

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

• GENIE/src/ReWeight/GReWeight.h
• GENIE/src/ReWeight/GReWeight.cxx