/usr/include/root/RooStats/SimpleLikelihoodRatioTestStat.h is in libroot-roofit-dev 5.34.19+dfsg-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Author: Kyle Cranmer and Sven Kreiss June 2010
/*************************************************************************
* Copyright (C) 1995-2008, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#ifndef ROOSTATS_SimpleLikelihoodRatioTestStat
#define ROOSTATS_SimpleLikelihoodRatioTestStat
//_________________________________________________
/*
BEGIN_HTML
<p>
SimpleLikelihoodRatioTestStat: TestStatistic that returns -log(L[null] / L[alt]) where
L is the likelihood.
</p>
END_HTML
*/
//
#ifndef ROOT_Rtypes
#include "Rtypes.h"
#endif
#ifndef ROO_NLL_VAR
#include "RooNLLVar.h"
#endif
#ifndef ROO_REAL_VAR
#include "RooRealVar.h"
#endif
#ifndef ROOSTATS_TestStatistic
#include "RooStats/TestStatistic.h"
#endif
namespace RooStats {
class SimpleLikelihoodRatioTestStat : public TestStatistic {
public:
//__________________________________
SimpleLikelihoodRatioTestStat() :
fNullPdf(NULL), fAltPdf(NULL)
{
// Constructor for proof. Do not use.
fFirstEval = true;
fDetailedOutputEnabled = false;
fDetailedOutput = NULL;
fNullParameters = NULL;
fAltParameters = NULL;
fReuseNll=kFALSE ;
fNllNull=NULL ;
fNllAlt=NULL ;
}
//__________________________________
SimpleLikelihoodRatioTestStat(
RooAbsPdf& nullPdf,
RooAbsPdf& altPdf
) :
fFirstEval(true)
{
// Takes null and alternate parameters from PDF. Can be overridden.
fNullPdf = &nullPdf;
fAltPdf = &altPdf;
RooArgSet * allNullVars = fNullPdf->getVariables();
fNullParameters = (RooArgSet*) allNullVars->snapshot();
delete allNullVars;
RooArgSet * allAltVars = fAltPdf->getVariables();
fAltParameters = (RooArgSet*) allAltVars->snapshot();
delete allAltVars;
fDetailedOutputEnabled = false;
fDetailedOutput = NULL;
fReuseNll=kFALSE ;
fNllNull=NULL ;
fNllAlt=NULL ;
}
//__________________________________
SimpleLikelihoodRatioTestStat(
RooAbsPdf& nullPdf,
RooAbsPdf& altPdf,
const RooArgSet& nullParameters,
const RooArgSet& altParameters
) :
fFirstEval(true)
{
// Takes null and alternate parameters from values in nullParameters
// and altParameters. Can be overridden.
fNullPdf = &nullPdf;
fAltPdf = &altPdf;
fNullParameters = (RooArgSet*) nullParameters.snapshot();
fAltParameters = (RooArgSet*) altParameters.snapshot();
fDetailedOutputEnabled = false;
fDetailedOutput = NULL;
fReuseNll=kFALSE ;
fNllNull=NULL ;
fNllAlt=NULL ;
}
//______________________________
virtual ~SimpleLikelihoodRatioTestStat() {
if (fNullParameters) delete fNullParameters;
if (fAltParameters) delete fAltParameters;
if (fNllNull) delete fNllNull ;
if (fNllAlt) delete fNllAlt ;
if (fDetailedOutput) delete fDetailedOutput;
}
static void SetAlwaysReuseNLL(Bool_t flag);
void SetReuseNLL(Bool_t flag) { fReuseNll = flag ; }
//_________________________________________
void SetNullParameters(const RooArgSet& nullParameters) {
if (fNullParameters) delete fNullParameters;
fFirstEval = true;
// if(fNullParameters) delete fNullParameters;
fNullParameters = (RooArgSet*) nullParameters.snapshot();
}
//_________________________________________
void SetAltParameters(const RooArgSet& altParameters) {
if (fAltParameters) delete fAltParameters;
fFirstEval = true;
// if(fAltParameters) delete fAltParameters;
fAltParameters = (RooArgSet*) altParameters.snapshot();
}
//______________________________
bool ParamsAreEqual() {
// this should be possible with RooAbsCollection
if (!fNullParameters->equals(*fAltParameters)) return false;
RooAbsReal* null;
RooAbsReal* alt;
TIterator* nullIt = fNullParameters->createIterator();
TIterator* altIt = fAltParameters->createIterator();
bool ret = true;
while ((null = (RooAbsReal*) nullIt->Next()) && (alt = (RooAbsReal*) altIt->Next())) {
if (null->getVal() != alt->getVal()) ret = false;
}
delete nullIt;
delete altIt;
return ret;
}
// set the conditional observables which will be used when creating the NLL
// so the pdf's will not be normalized on the conditional observables when computing the NLL
virtual void SetConditionalObservables(const RooArgSet& set) {fConditionalObs.removeAll(); fConditionalObs.add(set);}
//______________________________
virtual Double_t Evaluate(RooAbsData& data, RooArgSet& nullPOI);
virtual void EnableDetailedOutput( bool e=true ) { fDetailedOutputEnabled = e; fDetailedOutput = NULL; }
virtual const RooArgSet* GetDetailedOutput(void) const { return fDetailedOutput; }
virtual const TString GetVarName() const {
return "log(L(#mu_{1}) / L(#mu_{0}))";
}
private:
RooAbsPdf* fNullPdf;
RooAbsPdf* fAltPdf;
RooArgSet* fNullParameters;
RooArgSet* fAltParameters;
RooArgSet fConditionalObs;
bool fFirstEval;
bool fDetailedOutputEnabled;
RooArgSet* fDetailedOutput; //!
RooAbsReal* fNllNull ; //! transient copy of the null NLL
RooAbsReal* fNllAlt ; //! transient copy of the alt NLL
static Bool_t fgAlwaysReuseNll ;
Bool_t fReuseNll ;
protected:
ClassDef(SimpleLikelihoodRatioTestStat,3)
};
}
#endif
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