#include <SimplerLikelihoodRatioTestStat.h>

Public Member Functions
virtual Double_t	Evaluate (RooAbsData &data, RooArgSet &nullPOI)
virtual const TString	GetVarName () const
	SimplerLikelihoodRatioTestStat (RooAbsPdf &pdfNull, RooAbsPdf &pdfAlt, const RooArgSet &paramsNull=RooArgSet(), const RooArgSet &paramsAlt=RooArgSet())
Private Attributes
std::auto_ptr< RooArgSet >	paramsAlt_
std::auto_ptr< RooArgSet >	paramsNull_
RooAbsPdf *	pdfAlt_
RooAbsPdf *	pdfNull_
RooArgSet	snapAlt_
RooArgSet	snapNull_

Detailed Description

Definition at line 11 of file SimplerLikelihoodRatioTestStat.h.

Constructor & Destructor Documentation

SimplerLikelihoodRatioTestStat::SimplerLikelihoodRatioTestStat	(	RooAbsPdf &	pdfNull,
		RooAbsPdf &	pdfAlt,
		const RooArgSet &	paramsNull = `RooArgSet()`,
		const RooArgSet &	paramsAlt = `RooArgSet()`
	)		`[inline]`

Definition at line 13 of file SimplerLikelihoodRatioTestStat.h.

References snapAlt_, and snapNull_.

                                                                                                                                                                     : 
            pdfNull_(&pdfNull), pdfAlt_(&pdfAlt),
            paramsNull_(pdfNull_->getVariables()), 
            paramsAlt_(pdfAlt_->getVariables()) 
        {
            snapNull_.addClone(paramsNull);
            snapAlt_.addClone(paramsAlt);
        }

Member Function Documentation

virtual Double_t SimplerLikelihoodRatioTestStat::Evaluate	(	RooAbsData &	data,
		RooArgSet &	nullPOI
	)		`[inline, virtual]`

Definition at line 22 of file SimplerLikelihoodRatioTestStat.h.

References funct::log(), paramsAlt_, paramsNull_, pdfAlt_, pdfNull_, snapAlt_, and snapNull_.

        {
            if (data.numEntries() != 1) throw std::invalid_argument("HybridNew::TestSimpleStatistics: dataset doesn't have exactly 1 entry.");
            const RooArgSet *entry = data.get(0);
            *paramsNull_ = *entry;
            *paramsNull_ = snapNull_;
            *paramsNull_ = nullPOI;
            double nullNLL = pdfNull_->getVal();

            *paramsAlt_ = *entry;
            *paramsAlt_ = snapAlt_;
            double altNLL = pdfAlt_->getVal();

            return -log(nullNLL/altNLL);
        }

virtual const TString SimplerLikelihoodRatioTestStat::GetVarName ( ) const [inline, virtual]

Definition at line 38 of file SimplerLikelihoodRatioTestStat.h.

References pdfAlt_, and pdfNull_.

                                                 {
            return TString::Format("-log(%s/%s)", pdfNull_->GetName(), pdfAlt_->GetName()); 
        }