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 24 of file RatioOfProfiledLikelihoodsTestStat.h.

Public Member Functions
	RatioOfProfiledLikelihoodsTestStat ()

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

	~RatioOfProfiledLikelihoodsTestStat (void) override

virtual void	EnableDetailedOutput (bool e=true)

double	Evaluate (RooAbsData &data, RooArgSet &nullParamsOfInterest) override
	evaluate the ratio of profile likelihood

const RooArgSet *	GetDetailedOutput (void) const override
	Returns detailed output.

const TString	GetVarName () const override

TClass *	IsA () const override

double	ProfiledLikelihood (RooAbsData &data, RooArgSet &poi, RooAbsPdf &pdf)
	returns -logL(poi, conditional MLE of nuisance params) it does not subtract off the global MLE because nuisance parameters of null and alternate may not be the same.

void	SetConditionalObservables (const RooArgSet &set) override
	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

void	SetGlobalObservables (const RooArgSet &set) override
	set the global observables which will be used when creating the NLL so the constraint pdf's will be normalized correctly on the global observables when computing the NLL

void	SetMinimizer (const char *minimizer)

void	SetPrintLevel (Int_t printLevel)

void	SetReuseNLL (bool flag)

void	SetStrategy (Int_t strategy)

void	SetSubtractMLE (bool subtract)

void	SetTolerance (double tol)

void	Streamer (TBuffer &) override

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

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.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Static Public Member Functions
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static void	SetAlwaysReuseNLL (bool flag)

Static Public Member Functions inherited from RooStats::TestStatistic
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

Private Attributes
RooArgSet *	fAltPOI

ProfileLikelihoodTestStat	fAltProfile

RooArgSet *	fDetailedOutput

bool	fDetailedOutputEnabled

ProfileLikelihoodTestStat	fNullProfile

bool	fSubtractMLE

Static Private Attributes
static bool	fgAlwaysReuseNll = true

#include <RooStats/RatioOfProfiledLikelihoodsTestStat.h>

Inheritance diagram for RooStats::RatioOfProfiledLikelihoodsTestStat:

[legend]

Constructor & Destructor Documentation

◆ RatioOfProfiledLikelihoodsTestStat() [1/2]

RooStats::RatioOfProfiledLikelihoodsTestStat::RatioOfProfiledLikelihoodsTestStat ( )

inline

Definition at line 28 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ RatioOfProfiledLikelihoodsTestStat() [2/2]

RooStats::RatioOfProfiledLikelihoodsTestStat::RatioOfProfiledLikelihoodsTestStat	(	RooAbsPdf &	nullPdf,
		RooAbsPdf &	altPdf,
		const RooArgSet *	altPOI = `nullptr`
	)

inline

Definition at line 39 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ ~RatioOfProfiledLikelihoodsTestStat()

RooStats::RatioOfProfiledLikelihoodsTestStat::~RatioOfProfiledLikelihoodsTestStat ( void )

inlineoverride

Definition at line 57 of file RatioOfProfiledLikelihoodsTestStat.h.

Member Function Documentation

◆ Class()

static TClass * RooStats::RatioOfProfiledLikelihoodsTestStat::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * RooStats::RatioOfProfiledLikelihoodsTestStat::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t RooStats::RatioOfProfiledLikelihoodsTestStat::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 147 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ DeclFileName()

static const char * RooStats::RatioOfProfiledLikelihoodsTestStat::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 147 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ EnableDetailedOutput()

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

inlinevirtual

Definition at line 72 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ Evaluate()

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

overridevirtual

evaluate the ratio of profile likelihood

Implements RooStats::TestStatistic.

Definition at line 87 of file RatioOfProfiledLikelihoodsTestStat.cxx.

◆ GetDetailedOutput()

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

inlineoverridevirtual

Returns detailed output.

The value returned by this function is updated after each call to Evaluate(). The returned RooArgSet contains the following for the alternative and null hypotheses:

the minimum nll, fitstatus and convergence quality for each fit
for each fit and for each non-constant parameter, the value, error and pull of the parameter are stored

Reimplemented from RooStats::TestStatistic.

Definition at line 120 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ GetVarName()

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

inlineoverridevirtual

Implements RooStats::TestStatistic.

Definition at line 127 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ IsA()

TClass * RooStats::RatioOfProfiledLikelihoodsTestStat::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from RooStats::TestStatistic.

Definition at line 147 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ ProfiledLikelihood()

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

returns -logL(poi, conditional MLE of nuisance params) it does not subtract off the global MLE because nuisance parameters of null and alternate may not be the same.

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 flag )

static

Definition at line 59 of file RatioOfProfiledLikelihoodsTestStat.cxx.

◆ SetConditionalObservables()

void RooStats::RatioOfProfiledLikelihoodsTestStat::SetConditionalObservables ( const RooArgSet & set )

inlineoverridevirtual

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

Reimplemented from RooStats::TestStatistic.

Definition at line 104 of file RatioOfProfiledLikelihoodsTestStat.h.

◆ SetGlobalObservables()

void RooStats::RatioOfProfiledLikelihoodsTestStat::SetGlobalObservables ( const RooArgSet & set )

inlineoverridevirtual

set the global observables which will be used when creating the NLL so the constraint pdf's will be normalized correctly on the global observables when computing the NLL

Reimplemented from RooStats::TestStatistic.

Definition at line 111 of file RatioOfProfiledLikelihoodsTestStat.h.