ROOT   6.14/05 Reference Guide
RooStats::RatioOfProfiledLikelihoodsTestStat Class Reference

TestStatistic that returns the ratio of profiled likelihoods.

By default the calculation is:

$\log{ \frac{ \lambda(\mu_{alt} , {conditional \: MLE \: for \: alt \: nuisance}) } { \lambda(\mu_{null} , {conditional \: MLE \: for \: null \: nuisance}) } }$

where $$\lambda$$ is the profile likelihood ratio, so the MLE for the null and alternate are subtracted off.

If SetSubtractMLE(false) then it calculates:

$\log{ \frac{ L(\mu_{alt} , {conditional \: MLE \: for \: alt \: nuisance}) } { L(\mu_{null} , {conditional \: MLE \: for \: null \: nuisance}) } }$

where $$L$$ is the Likelihood function.

The values of the parameters of interest for the alternative hypothesis are taken at the time of the construction. If empty, it treats all free parameters as nuisance parameters.

The value of the parameters of interest for the null hypotheses are given at each call of Evaluate.

This test statistic is often called the Tevatron test statistic, because it has been used by the Tevatron experiments.

Definition at line 26 of file RatioOfProfiledLikelihoodsTestStat.h.

## Public Member Functions

RatioOfProfiledLikelihoodsTestStat ()

RatioOfProfiledLikelihoodsTestStat (RooAbsPdf &nullPdf, RooAbsPdf &altPdf, const RooArgSet *altPOI=0)

~RatioOfProfiledLikelihoodsTestStat (void)

virtual void EnableDetailedOutput (bool e=true)

virtual Double_t Evaluate (RooAbsData &data, RooArgSet &nullParamsOfInterest)
evaluate the ratio of profile likelihood More...

virtual const RooArgSetGetDetailedOutput (void) const
return detailed output: for fits this can be pulls, processing time, ... The returned pointer will not loose validity until another call to Evaluate. More...

virtual const TString GetVarName () const

Double_t ProfiledLikelihood (RooAbsData &data, RooArgSet &poi, RooAbsPdf &pdf)
returns -logL(poi, conditional MLE of nuisance params) subtract off the global MLE or not depending on the option It is the numerator or the denominator of the ratio (depending on the pdf) More...

virtual void SetConditionalObservables (const RooArgSet &set)
interface to set conditional observables. If a test statistics needs them it will re-implement this function More...

virtual void SetGlobalObservables (const RooArgSet &set)
interface to set global observables. If a test statistics needs them it will re-implement this function More...

void SetMinimizer (const char *minimizer)

void SetPrintLevel (Int_t printLevel)

void SetReuseNLL (Bool_t flag)

void SetStrategy (Int_t strategy)

void SetSubtractMLE (bool subtract)

void SetTolerance (Double_t tol)

Public Member Functions inherited from RooStats::TestStatistic
virtual ~TestStatistic ()

virtual bool PValueIsRightTail (void) const
Defines the sign convention of the test statistic. Overwrite function if necessary. More...

## Static Public Member Functions

static void SetAlwaysReuseNLL (Bool_t flag)

## Private Attributes

RooArgSetfAltPOI

ProfileLikelihoodTestStat fAltProfile

RooArgSetfDetailedOutput

bool fDetailedOutputEnabled

ProfileLikelihoodTestStat fNullProfile

Bool_t fSubtractMLE

## Static Private Attributes

static Bool_t fgAlwaysReuseNll = kTRUE

#include <RooStats/RatioOfProfiledLikelihoodsTestStat.h>

Inheritance diagram for RooStats::RatioOfProfiledLikelihoodsTestStat:
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## ◆ RatioOfProfiledLikelihoodsTestStat() [1/2]

 RooStats::RatioOfProfiledLikelihoodsTestStat::RatioOfProfiledLikelihoodsTestStat ( )
inline

Definition at line 30 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ RatioOfProfiledLikelihoodsTestStat() [2/2]

 RooStats::RatioOfProfiledLikelihoodsTestStat::RatioOfProfiledLikelihoodsTestStat ( RooAbsPdf & nullPdf, RooAbsPdf & altPdf, const RooArgSet * altPOI = 0 )
inline

Definition at line 41 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ ~RatioOfProfiledLikelihoodsTestStat()

 RooStats::RatioOfProfiledLikelihoodsTestStat::~RatioOfProfiledLikelihoodsTestStat ( void )
inline

Definition at line 59 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ EnableDetailedOutput()

 virtual void RooStats::RatioOfProfiledLikelihoodsTestStat::EnableDetailedOutput ( bool e = true )
inlinevirtual

Definition at line 74 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ Evaluate()

 Double_t RooStats::RatioOfProfiledLikelihoodsTestStat::Evaluate ( RooAbsData & data, RooArgSet & nullParamsOfInterest )
virtual

evaluate the ratio of profile likelihood

Implements RooStats::TestStatistic.

Definition at line 87 of file RatioOfProfiledLikelihoodsTestStat.cxx.

## ◆ GetDetailedOutput()

 virtual const RooArgSet* RooStats::RatioOfProfiledLikelihoodsTestStat::GetDetailedOutput ( void ) const
inlinevirtual

return detailed output: for fits this can be pulls, processing time, ... The returned pointer will not loose validity until another call to Evaluate.

Reimplemented from RooStats::TestStatistic.

Definition at line 118 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ GetVarName()

 virtual const TString RooStats::RatioOfProfiledLikelihoodsTestStat::GetVarName ( ) const
inlinevirtual

Implements RooStats::TestStatistic.

Definition at line 129 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ ProfiledLikelihood()

 Double_t RooStats::RatioOfProfiledLikelihoodsTestStat::ProfiledLikelihood ( RooAbsData & data, RooArgSet & poi, RooAbsPdf & pdf )

returns -logL(poi, conditional MLE of nuisance params) subtract off the global MLE or not depending on the option It is the numerator or the denominator of the ratio (depending on the pdf)

L.M. : not sure why this method is needed now

Definition at line 68 of file RatioOfProfiledLikelihoodsTestStat.cxx.

## ◆ SetAlwaysReuseNLL()

 void RooStats::RatioOfProfiledLikelihoodsTestStat::SetAlwaysReuseNLL ( Bool_t flag )
static

Definition at line 59 of file RatioOfProfiledLikelihoodsTestStat.cxx.

## ◆ SetConditionalObservables()

 virtual void RooStats::RatioOfProfiledLikelihoodsTestStat::SetConditionalObservables ( const RooArgSet & )
inlinevirtual

interface to set conditional observables. If a test statistics needs them it will re-implement this function

Reimplemented from RooStats::TestStatistic.

Definition at line 106 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ SetGlobalObservables()

 virtual void RooStats::RatioOfProfiledLikelihoodsTestStat::SetGlobalObservables ( const RooArgSet & )
inlinevirtual

interface to set global observables. If a test statistics needs them it will re-implement this function

Reimplemented from RooStats::TestStatistic.

Definition at line 113 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ SetMinimizer()

 void RooStats::RatioOfProfiledLikelihoodsTestStat::SetMinimizer ( const char * minimizer )
inline

Definition at line 87 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ SetPrintLevel()

 void RooStats::RatioOfProfiledLikelihoodsTestStat::SetPrintLevel ( Int_t printLevel )
inline

Definition at line 99 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ SetReuseNLL()

 void RooStats::RatioOfProfiledLikelihoodsTestStat::SetReuseNLL ( Bool_t flag )
inline

Definition at line 82 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ SetStrategy()

 void RooStats::RatioOfProfiledLikelihoodsTestStat::SetStrategy ( Int_t strategy )
inline

Definition at line 91 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ SetSubtractMLE()

 void RooStats::RatioOfProfiledLikelihoodsTestStat::SetSubtractMLE ( bool subtract )
inline

Definition at line 133 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ SetTolerance()

 void RooStats::RatioOfProfiledLikelihoodsTestStat::SetTolerance ( Double_t tol )
inline

Definition at line 95 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ fAltPOI

 RooArgSet* RooStats::RatioOfProfiledLikelihoodsTestStat::fAltPOI
private

Definition at line 140 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ fAltProfile

 ProfileLikelihoodTestStat RooStats::RatioOfProfiledLikelihoodsTestStat::fAltProfile
private

Definition at line 138 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ fDetailedOutput

 RooArgSet* RooStats::RatioOfProfiledLikelihoodsTestStat::fDetailedOutput
private

Definition at line 145 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ fDetailedOutputEnabled

 bool RooStats::RatioOfProfiledLikelihoodsTestStat::fDetailedOutputEnabled
private

Definition at line 144 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ fgAlwaysReuseNll

 Bool_t RooStats::RatioOfProfiledLikelihoodsTestStat::fgAlwaysReuseNll = kTRUE
staticprivate

Definition at line 142 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ fNullProfile

 ProfileLikelihoodTestStat RooStats::RatioOfProfiledLikelihoodsTestStat::fNullProfile
private

Definition at line 137 of file RatioOfProfiledLikelihoodsTestStat.h.

## ◆ fSubtractMLE

 Bool_t RooStats::RatioOfProfiledLikelihoodsTestStat::fSubtractMLE
private

Definition at line 141 of file RatioOfProfiledLikelihoodsTestStat.h.

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