RooChi2Var Class Reference

RooChi2Var implements a simple \( \chi^2 \) calculation from a binned dataset and a PDF.

It calculates:

\begin{align*} \chi^2 &= \sum_{\mathrm{bins}} \left( \frac{N_\mathrm{PDF,bin} - N_\mathrm{Data,bin}}{\Delta_\mathrm{bin}} \right)^2 \\ N_\mathrm{PDF,bin} &= \begin{cases} \mathrm{pdf}(\text{bin centre}) \cdot V_\mathrm{bin} \cdot N_\mathrm{Data,tot} &\text{normal PDF}\\ \mathrm{pdf}(\text{bin centre}) \cdot V_\mathrm{bin} \cdot N_\mathrm{Data,expected} &\text{extended PDF} \end{cases} \\ \Delta_\mathrm{bin} &= \begin{cases} \sqrt{N_\mathrm{PDF,bin}} &\text{if } \mathtt{DataError == RooAbsData::Expected}\\ \mathtt{data{\rightarrow}weightError()} &\text{otherwise} \\ \end{cases} \end{align*}

If the dataset doesn't have user-defined errors, errors are assumed to be \( \sqrt{N} \). In extended PDF mode, N_tot (total number of data events) is substituted with N_expected, the expected number of events that the PDF predicts.

Note

If the dataset has errors stored, empty bins will prevent the calculation of \( \chi^2 \), because those have zero error. This leads to messages like:

[#0] ERROR:Eval -- RooChi2Var::RooChi2Var(chi2_GenPdf_data_hist) INFINITY ERROR: bin 2 has zero error

In this case, one can use the expected errors of the PDF instead of the data errors:

RooChi2Var chi2(..., ..., RooFit::DataError(RooAbsData::Expected), ...);

PyROOT

Constructor of RooChi2Var takes a RooCmdArg as argument also supports keyword arguments.

Definition at line 25 of file RooChi2Var.h.

Public Types
enum	FuncMode { Function , Pdf , ExtendedPdf }
Public Types inherited from RooAbsTestStatistic
enum	GOFOpMode { SimMaster , MPMaster , Slave }
Public Types inherited from RooAbsReal
enum	ErrorLoggingMode { PrintErrors , CollectErrors , CountErrors , Ignore }
typedef std::map< constRooAbsArg *, std::pair< std::string, std::list< EvalError > > >::const_iterator	EvalErrorIter
enum	ScaleType { Raw , Relative , NumEvent , RelativeExpected }
using	value_type = double
Public Types inherited from RooAbsArg
enum	CacheMode { Always =0 , NotAdvised =1 , Never =2 }
enum	ConstOpCode { Activate =0 , DeActivate =1 , ConfigChange =2 , ValueChange =3 }
enum	OperMode { Auto =0 , AClean =1 , ADirty =2 }
using	RefCountList_t = RooSTLRefCountList< RooAbsArg >
using	RefCountListLegacyIterator_t = TIteratorToSTLInterface< RefCountList_t::Container_t >
Public Types inherited from TObject
enum	{   kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,   kBitMask = 0x00ffffff }
enum	{ kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) }
enum	EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }
enum	EStatusBits {   kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) ,   kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 )) }
Public Types inherited from RooPrintable
enum	ContentsOption {   kName =1 , kClassName =2 , kValue =4 , kArgs =8 ,   kExtras =16 , kAddress =32 , kTitle =64 , kCollectionHeader =128 }
enum	StyleOption {   kInline =1 , kSingleLine =2 , kStandard =3 , kVerbose =4 ,   kTreeStructure =5 }

Public Member Functions
	RooChi2Var (const char *name, const char *title, RooAbsPdf &pdf, RooDataHist &data, const RooCmdArg &arg1=RooCmdArg::none(), const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none(), const RooCmdArg &arg9=RooCmdArg::none())
	RooChi2Var constructor.
	RooChi2Var (const char *name, const char *title, RooAbsReal &func, RooDataHist &data, const RooCmdArg &arg1=RooCmdArg::none(), const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none(), const RooCmdArg &arg9=RooCmdArg::none())
	RooChi2Var constructor.
	RooChi2Var (const RooChi2Var &other, const char *name=nullptr)
	Copy constructor.
TObject *	clone (const char *newname) const override
RooAbsTestStatistic *	create (const char *name, const char *title, RooAbsReal &pdf, RooAbsData &dhist, const RooArgSet &projDeps, RooAbsTestStatistic::Configuration const &cfg) override
double	defaultErrorLevel () const override
TClass *	IsA () const override
void	Streamer (TBuffer &) override
	Stream an object of class TObject.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
Public Member Functions inherited from RooAbsOptTestStatistic
	RooAbsOptTestStatistic ()
	Default Constructor.
	RooAbsOptTestStatistic (const char *name, const char *title, RooAbsReal &real, RooAbsData &data, const RooArgSet &projDeps, RooAbsTestStatistic::Configuration const &cfg)
	Create a test statistic, and optimise its calculation.
	RooAbsOptTestStatistic (const RooAbsOptTestStatistic &other, const char *name=nullptr)
	Copy constructor.
	~RooAbsOptTestStatistic () override
	Destructor.
const char *	cacheUniqueSuffix () const override
	Returns a suffix string that is unique for RooAbsOptTestStatistic instances that don't share the same cloned input data object.
double	combinedValue (RooAbsReal **gofArray, Int_t nVal) const override
	Method to combined test statistic results calculated into partitions into the global result.
RooAbsData &	data ()
const RooAbsData &	data () const
RooAbsReal &	function ()
const RooAbsReal &	function () const
TClass *	IsA () const override
bool	isDerived () const override
	Does value or shape of this arg depend on any other arg?
bool	isSealed () const
void	seal (const char *notice="")
const char *	sealNotice () const
void	Streamer (TBuffer &) override
	Stream an object of class TObject.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
Public Member Functions inherited from RooAbsTestStatistic
	RooAbsTestStatistic ()
	RooAbsTestStatistic (const char *name, const char *title, RooAbsReal &real, RooAbsData &data, const RooArgSet &projDeps, Configuration const &cfg)
	Create a test statistic from the given function and the data.
	RooAbsTestStatistic (const RooAbsTestStatistic &other, const char *name=nullptr)
	Copy constructor.
	~RooAbsTestStatistic () override
	Destructor.
virtual double	combinedValue (RooAbsReal **gofArray, Int_t nVal) const =0
void	constOptimizeTestStatistic (ConstOpCode opcode, bool doAlsoTrackingOpt=true) override
	Forward constant term optimization management calls to component test statistics.
virtual RooAbsTestStatistic *	create (const char *name, const char *title, RooAbsReal &real, RooAbsData &data, const RooArgSet &projDeps, Configuration const &cfg)=0
void	enableOffsetting (bool flag) override
virtual double	globalNormalization () const
TClass *	IsA () const override
bool	isOffsetting () const override
double	offset () const override
virtual double	offsetCarry () const
GOFOpMode	operMode () const
bool	setData (RooAbsData &data, bool cloneData=true) override
	Change dataset that is used to given one.
void	Streamer (TBuffer &) override
	Stream an object of class TObject.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
Public Member Functions inherited from RooAbsReal
	RooAbsReal ()
	coverity[UNINIT_CTOR] Default constructor
	RooAbsReal (const char *name, const char *title, const char *unit="")
	Constructor with unit label.
	RooAbsReal (const char *name, const char *title, double minVal, double maxVal, const char *unit="")
	Constructor with plot range and unit label.
	RooAbsReal (const RooAbsReal &other, const char *name=nullptr)
	Copy constructor.
	~RooAbsReal () override
	Destructor.
virtual double	analyticalIntegral (Int_t code, const char *rangeName=nullptr) const
	Implements the actual analytical integral(s) advertised by getAnalyticalIntegral.
virtual double	analyticalIntegralWN (Int_t code, const RooArgSet *normSet, const char *rangeName=nullptr) const
	Implements the actual analytical integral(s) advertised by getAnalyticalIntegral.
TF1 *	asTF (const RooArgList &obs, const RooArgList &pars=RooArgList(), const RooArgSet &nset=RooArgSet()) const
	Return a ROOT TF1,2,3 object bound to this RooAbsReal with given definition of observables and parameters.
virtual std::list< double > *	binBoundaries (RooAbsRealLValue &obs, double xlo, double xhi) const
	Retrieve bin boundaries if this distribution is binned in obs.
RooAbsFunc *	bindVars (const RooArgSet &vars, const RooArgSet *nset=nullptr, bool clipInvalid=false) const
	Create an interface adaptor f(vars) that binds us to the specified variables (in arbitrary order).
virtual std::string	buildCallToAnalyticIntegral (Int_t code, const char *rangeName, RooFit::Detail::CodeSquashContext &ctx) const
	This function defines the analytical integral translation for the class.
virtual RooFitResult *	chi2FitTo (RooDataHist &data, const RooCmdArg &arg1=RooCmdArg::none(), const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none())
	Perform a \( \chi^2 \) fit to given histogram.
virtual RooFitResult *	chi2FitTo (RooDataHist &data, const RooLinkedList &cmdList)
	Perform a \( \chi^2 \) fit to given histogram.
virtual RooFitResult *	chi2FitTo (RooDataSet &xydata, const RooCmdArg &arg1=RooCmdArg::none(), const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none())
	Perform a 2-D \( \chi^2 \) fit using a series of x and y values stored in the dataset xydata.
virtual RooFitResult *	chi2FitTo (RooDataSet &xydata, const RooLinkedList &cmdList)
	Perform a 2-D \( \chi^2 \) fit using a series of x and y values stored in the dataset xydata.
virtual void	computeBatch (cudaStream_t *, double *output, size_t size, RooFit::Detail::DataMap const &) const
	Base function for computing multiple values of a RooAbsReal.
virtual RooAbsReal *	createChi2 (RooDataHist &data, const RooCmdArg &arg1=RooCmdArg::none(), const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none())
	Create a \( \chi^2 \) variable from a histogram and this function.
virtual RooAbsReal *	createChi2 (RooDataHist &data, const RooLinkedList &cmdList)
virtual RooAbsReal *	createChi2 (RooDataSet &data, const RooCmdArg &arg1=RooCmdArg::none(), const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none())
	Create a \( \chi^2 \) from a series of x and y values stored in a dataset.
virtual RooAbsReal *	createChi2 (RooDataSet &data, const RooLinkedList &cmdList)
	See RooAbsReal::createChi2(RooDataSet&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&)
RooAbsArg *	createFundamental (const char *newname=nullptr) const override
	Create a RooRealVar fundamental object with our properties.
TH1 *	createHistogram (const char *name, const RooAbsRealLValue &xvar, const RooCmdArg &arg1=RooCmdArg::none(), const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none()) const
	Create and fill a ROOT histogram TH1, TH2 or TH3 with the values of this function.
TH1 *	createHistogram (const char *name, const RooAbsRealLValue &xvar, RooLinkedList &argList) const
	Internal method implementing createHistogram.
TH1 *	createHistogram (RooStringView varNameList, Int_t xbins=0, Int_t ybins=0, Int_t zbins=0) const
	Create and fill a ROOT histogram TH1, TH2 or TH3 with the values of this function for the variables with given names.
RooFit::OwningPtr< RooAbsReal >	createIntegral (const RooArgSet &iset, const char *rangeName) const
	Create integral over observables in iset in range named rangeName.
RooFit::OwningPtr< RooAbsReal >	createIntegral (const RooArgSet &iset, const RooArgSet &nset, const char *rangeName=nullptr) const
	Create integral over observables in iset in range named rangeName with integrand normalized over observables in nset.
RooFit::OwningPtr< RooAbsReal >	createIntegral (const RooArgSet &iset, const RooArgSet &nset, const RooNumIntConfig &cfg, const char *rangeName=nullptr) const
	Create integral over observables in iset in range named rangeName with integrand normalized over observables in nset while using specified configuration for any numeric integration.
virtual RooFit::OwningPtr< RooAbsReal >	createIntegral (const RooArgSet &iset, const RooArgSet *nset=nullptr, const RooNumIntConfig *cfg=nullptr, const char *rangeName=nullptr) const
	Create an object that represents the integral of the function over one or more observables std::listed in iset.
RooFit::OwningPtr< RooAbsReal >	createIntegral (const RooArgSet &iset, const RooCmdArg &arg1, const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none()) const
	Create an object that represents the integral of the function over one or more observables std::listed in iset.
RooFit::OwningPtr< RooAbsReal >	createIntegral (const RooArgSet &iset, const RooNumIntConfig &cfg, const char *rangeName=nullptr) const
	Create integral over observables in iset in range named rangeName using specified configuration for any numeric integration.
RooFit::OwningPtr< RooAbsReal >	createIntRI (const RooArgSet &iset, const RooArgSet &nset={})
	Utility function for createRunningIntegral.
const RooAbsReal *	createPlotProjection (const RooArgSet &dependentVars, const RooArgSet *projectedVars, RooArgSet *&cloneSet, const char *rangeName=nullptr, const RooArgSet *condObs=nullptr) const
	Utility function for plotOn() that creates a projection of a function or p.d.f to be plotted on a RooPlot.
const RooAbsReal *	createPlotProjection (const RooArgSet &depVars, const RooArgSet &projVars, RooArgSet *&cloneSet) const
	Utility function for plotOn() that creates a projection of a function or p.d.f to be plotted on a RooPlot.
virtual RooAbsReal *	createProfile (const RooArgSet &paramsOfInterest)
	Create a RooProfileLL object that eliminates all nuisance parameters in the present function.
RooFit::OwningPtr< RooAbsReal >	createRunningIntegral (const RooArgSet &iset, const RooArgSet &nset={})
	Calls createRunningIntegral(const RooArgSet&, const RooCmdArg&, const RooCmdArg&, const RooCmdArg&, const RooCmdArg&, const RooCmdArg&, const RooCmdArg&, const RooCmdArg&, const RooCmdArg&)
RooFit::OwningPtr< RooAbsReal >	createRunningIntegral (const RooArgSet &iset, const RooCmdArg &arg1, const RooCmdArg &arg2=RooCmdArg::none(), const RooCmdArg &arg3=RooCmdArg::none(), const RooCmdArg &arg4=RooCmdArg::none(), const RooCmdArg &arg5=RooCmdArg::none(), const RooCmdArg &arg6=RooCmdArg::none(), const RooCmdArg &arg7=RooCmdArg::none(), const RooCmdArg &arg8=RooCmdArg::none())
	Create an object that represents the running integral of the function over one or more observables std::listed in iset, i.e.
RooFit::OwningPtr< RooAbsReal >	createScanRI (const RooArgSet &iset, const RooArgSet &nset, Int_t numScanBins, Int_t intOrder)
	Utility function for createRunningIntegral that construct an object implementing the numeric scanning technique for calculating the running integral.
virtual double	defaultErrorLevel () const
RooDerivative *	derivative (RooRealVar &obs, const RooArgSet &normSet, Int_t order, double eps=0.001)
	Return function representing first, second or third order derivative of this function.
RooDerivative *	derivative (RooRealVar &obs, Int_t order=1, double eps=0.001)
	Return function representing first, second or third order derivative of this function.
virtual void	enableOffsetting (bool)
RooDataHist *	fillDataHist (RooDataHist *hist, const RooArgSet *nset, double scaleFactor, bool correctForBinVolume=false, bool showProgress=false) const
	Fill a RooDataHist with values sampled from this function at the bin centers.
TH1 *	fillHistogram (TH1 *hist, const RooArgList &plotVars, double scaleFactor=1, const RooArgSet *projectedVars=nullptr, bool scaling=true, const RooArgSet *condObs=nullptr, bool setError=true) const
	Fill the ROOT histogram 'hist' with values sampled from this function at the bin centers.
double	findRoot (RooRealVar &x, double xmin, double xmax, double yval)
	Return value of x (in range xmin,xmax) at which function equals yval.
virtual void	fixAddCoefNormalization (const RooArgSet &addNormSet=RooArgSet(), bool force=true)
	Fix the interpretation of the coefficient of any RooAddPdf component in the expression tree headed by this object to the given set of observables.
virtual void	fixAddCoefRange (const char *rangeName=nullptr, bool force=true)
	Fix the interpretation of the coefficient of any RooAddPdf component in the expression tree headed by this object to the given set of observables.
virtual bool	forceAnalyticalInt (const RooAbsArg &) const
virtual void	forceNumInt (bool flag=true)
RooFunctor *	functor (const RooArgList &obs, const RooArgList &pars=RooArgList(), const RooArgSet &nset=RooArgSet()) const
	Return a RooFunctor object bound to this RooAbsReal with given definition of observables and parameters.
virtual Int_t	getAnalyticalIntegral (RooArgSet &allVars, RooArgSet &analVars, const char *rangeName=nullptr) const
	Interface function getAnalyticalIntergral advertises the analytical integrals that are supported.
virtual Int_t	getAnalyticalIntegralWN (RooArgSet &allVars, RooArgSet &analVars, const RooArgSet *normSet, const char *rangeName=nullptr) const
	Variant of getAnalyticalIntegral that is also passed the normalization set that should be applied to the integrand of which the integral is requested.
bool	getForceNumInt () const
RooNumIntConfig *	getIntegratorConfig ()
	Return the numeric integration configuration used for this object.
const RooNumIntConfig *	getIntegratorConfig () const
	Return the numeric integration configuration used for this object.
virtual Int_t	getMaxVal (const RooArgSet &vars) const
	Advertise capability to determine maximum value of function for given set of observables.
const char *	getPlotLabel () const
	Get the label associated with the variable.
double	getPropagatedError (const RooFitResult &fr, const RooArgSet &nset=RooArgSet()) const
	Calculate error on self by linearly propagating errors on parameters using the covariance matrix from a fit result.
TString	getTitle (bool appendUnit=false) const
	Return this variable's title std::string.
const Text_t *	getUnit () const
double	getVal (const RooArgSet &normalisationSet) const
	Like getVal(const RooArgSet*), but always requires an argument for normalisation.
double	getVal (const RooArgSet *normalisationSet=nullptr) const
	Evaluate object.
std::vector< double >	getValues (RooAbsData const &data) const
virtual RooSpan< const double >	getValues (RooBatchCompute::RunContext &evalData, const RooArgSet *normSet=nullptr) const
	Compute batch of values for input data stored in evalData.
virtual double	getValV (const RooArgSet *normalisationSet=nullptr) const
	Return value of object.
TClass *	IsA () const override
virtual bool	isBinnedDistribution (const RooArgSet &) const
	Tests if the distribution is binned. Unless overridden by derived classes, this always returns false.
bool	isIdentical (const RooAbsArg &other, bool assumeSameType=false) const override
virtual bool	isOffsetting () const
bool	isSelectedComp () const
	If true, the current pdf is a selected component (for use in plotting)
void	logEvalError (const char *message, const char *serverValueString=nullptr) const
	Log evaluation error message.
virtual double	maxVal (Int_t code) const
	Return maximum value for set of observables identified by code assigned in getMaxVal.
RooAbsMoment *	mean (RooRealVar &obs)
RooAbsMoment *	mean (RooRealVar &obs, const RooArgSet &nset)
virtual Int_t	minTrialSamples (const RooArgSet &) const
RooAbsMoment *	moment (RooRealVar &obs, const RooArgSet &normObs, Int_t order, bool central, bool takeRoot, bool intNormObs)
	Return function representing moment of p.d.f (normalized w.r.t given observables) of given order.
RooAbsMoment *	moment (RooRealVar &obs, Int_t order, bool central, bool takeRoot)
	Return function representing moment of function of given order.
virtual double	offset () const
bool	operator== (const RooAbsArg &other) const override
	Equality operator when comparing to another RooAbsArg.
bool	operator== (double value) const
	Equality operator comparing to a double.
virtual RooPlot *	plotOn (RooPlot *frame, const RooCmdArg &arg1=RooCmdArg(), const RooCmdArg &arg2=RooCmdArg(), const RooCmdArg &arg3=RooCmdArg(), const RooCmdArg &arg4=RooCmdArg(), const RooCmdArg &arg5=RooCmdArg(), const RooCmdArg &arg6=RooCmdArg(), const RooCmdArg &arg7=RooCmdArg(), const RooCmdArg &arg8=RooCmdArg(), const RooCmdArg &arg9=RooCmdArg(), const RooCmdArg &arg10=RooCmdArg()) const
	Plot (project) PDF on specified frame.
virtual RooPlot *	plotOn (RooPlot *frame, RooLinkedList &cmdList) const
	Internal back-end function of plotOn() with named arguments.
virtual std::list< double > *	plotSamplingHint (RooAbsRealLValue &obs, double xlo, double xhi) const
	Interface for returning an optional hint for initial sampling points when constructing a curve projected on observable obs.
virtual RooPlot *	plotSliceOn (RooPlot *frame, const RooArgSet &sliceSet, Option_t *drawOptions="L", double scaleFactor=1.0, ScaleType stype=Relative, const RooAbsData *projData=nullptr) const
virtual void	preferredObservableScanOrder (const RooArgSet &obs, RooArgSet &orderedObs) const
	Interface method for function objects to indicate their preferred order of observables for scanning their values into a (multi-dimensional) histogram or RooDataSet.
void	printMultiline (std::ostream &os, Int_t contents, bool verbose=false, TString indent="") const override
	Structure printing.
void	printValue (std::ostream &os) const override
	Print object value.
bool	readFromStream (std::istream &is, bool compact, bool verbose=false) override
	Read object contents from stream (dummy for now)
void	selectComp (bool flag)
void	setCachedValue (double value, bool notifyClients=true) final
	Overwrite the value stored in this object's cache.
virtual bool	setData (RooAbsData &, bool=true)
void	setIntegratorConfig ()
	Remove the specialized numeric integration configuration associated with this object.
void	setIntegratorConfig (const RooNumIntConfig &config)
	Set the given integrator configuration as default numeric integration configuration for this object.
void	setParameterizeIntegral (const RooArgSet &paramVars)
void	setPlotLabel (const char *label)
	Set the label associated with this variable.
void	setUnit (const char *unit)
RooAbsMoment *	sigma (RooRealVar &obs)
RooAbsMoment *	sigma (RooRealVar &obs, const RooArgSet &nset)
RooNumIntConfig *	specialIntegratorConfig () const
	Returns the specialized integrator configuration for this RooAbsReal.
RooNumIntConfig *	specialIntegratorConfig (bool createOnTheFly)
	Returns the specialized integrator configuration for this RooAbsReal.
void	Streamer (TBuffer &) override
	Stream an object of class TObject.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
void	writeToStream (std::ostream &os, bool compact) const override
	Write object contents to stream (dummy for now)
Public Member Functions inherited from RooAbsArg
	RooAbsArg ()
	Default constructor.
	RooAbsArg (const char *name, const char *title)
	Create an object with the specified name and descriptive title.
	RooAbsArg (const RooAbsArg &other, const char *name=nullptr)
	Copy constructor transfers all boolean and string properties of the original object.
	~RooAbsArg () override
	Destructor.
bool	addOwnedComponents (const RooAbsCollection &comps)
	Take ownership of the contents of 'comps'.
bool	addOwnedComponents (RooAbsCollection &&comps)
	Take ownership of the contents of 'comps'.
bool	addOwnedComponents (RooArgList &&comps)
	Take ownership of the contents of 'comps'.
template<typename... Args_t>
bool	addOwnedComponents (std::unique_ptr< Args_t >... comps)
virtual void	applyWeightSquared (bool flag)
	Disables or enables the usage of squared weights.
void	attachArgs (const RooAbsCollection &set)
	Bind this node to objects in set.
void	attachDataSet (const RooAbsData &set)
	Replace server nodes with names matching the dataset variable names with those data set variables, making this PDF directly dependent on the dataset.
void	attachDataStore (const RooAbsDataStore &set)
	Replace server nodes with names matching the dataset variable names with those data set variables, making this PDF directly dependent on the dataset.
const std::set< std::string > &	attributes () const
virtual bool	canComputeBatchWithCuda () const
virtual bool	checkObservables (const RooArgSet *nset) const
	Overloadable function in which derived classes can implement consistency checks of the variables.
virtual TObject *	clone (const char *newname=nullptr) const =0
TObject *	Clone (const char *newname=nullptr) const override
	Make a clone of an object using the Streamer facility.
virtual RooAbsArg *	cloneTree (const char *newname=nullptr) const
	Clone tree expression of objects.
Int_t	Compare (const TObject *other) const override
	Utility function used by TCollection::Sort to compare contained TObjects We implement comparison by name, resulting in alphabetical sorting by object name.
virtual std::unique_ptr< RooAbsArg >	compileForNormSet (RooArgSet const &normSet, RooFit::Detail::CompileContext &ctx) const
std::size_t	dataToken () const
	Returns the token for retrieving results in the BatchMode. For internal use only.
Int_t	defaultPrintContents (Option_t *opt) const override
	Define default contents to print.
bool	dependsOn (const RooAbsArg &server, const RooAbsArg *ignoreArg=nullptr, bool valueOnly=false) const
	Test whether we depend on (ie, are served by) the specified object.
bool	dependsOn (const RooAbsCollection &serverList, const RooAbsArg *ignoreArg=nullptr, bool valueOnly=false) const
	Test whether we depend on (ie, are served by) any object in the specified collection.
bool	dependsOn (TNamed const *namePtr, const RooAbsArg *ignoreArg=nullptr, bool valueOnly=false) const
	Test whether we depend on (ie, are served by) an object with a specific name.
bool	dependsOnValue (const RooAbsArg &server, const RooAbsArg *ignoreArg=nullptr) const
	Check whether this object depends on values served from the object passed as server.
bool	dependsOnValue (const RooAbsCollection &serverList, const RooAbsArg *ignoreArg=nullptr) const
	Check whether this object depends on values from an element in the serverList.
bool	getAttribute (const Text_t *name) const
	Check if a named attribute is set. By default, all attributes are unset.
RooLinkedList	getCloningAncestors () const
	Return ancestors in cloning chain of this RooAbsArg.
RooFit::OwningPtr< RooArgSet >	getComponents () const
	Create a RooArgSet with all components (branch nodes) of the expression tree headed by this object.
bool	getObservables (const RooAbsCollection *depList, RooArgSet &outputSet, bool valueOnly=true) const
	Create a list of leaf nodes in the arg tree starting with ourself as top node that match any of the names the args in the supplied argset.
RooFit::OwningPtr< RooArgSet >	getObservables (const RooAbsData &data) const
	Return the observables of this pdf given the observables defined by data.
RooFit::OwningPtr< RooArgSet >	getObservables (const RooAbsData *data) const
	Create a list of leaf nodes in the arg tree starting with ourself as top node that match any of the names of the variable list of the supplied data set (the dependents).
RooFit::OwningPtr< RooArgSet >	getObservables (const RooArgSet &set, bool valueOnly=true) const
	Given a set of possible observables, return the observables that this PDF depends on.
RooFit::OwningPtr< RooArgSet >	getObservables (const RooArgSet *depList, bool valueOnly=true) const
	Create a list of leaf nodes in the arg tree starting with ourself as top node that match any of the names the args in the supplied argset.
RooFit::OwningPtr< RooArgSet >	getParameters (const RooAbsData &data, bool stripDisconnected=true) const
	Return the parameters of this p.d.f when used in conjuction with dataset 'data'.
RooFit::OwningPtr< RooArgSet >	getParameters (const RooAbsData *data, bool stripDisconnected=true) const
	Create a list of leaf nodes in the arg tree starting with ourself as top node that don't match any of the names of the variable list of the supplied data set (the dependents).
RooFit::OwningPtr< RooArgSet >	getParameters (const RooArgSet &observables, bool stripDisconnected=true) const
	Return the parameters of the p.d.f given the provided set of observables.
RooFit::OwningPtr< RooArgSet >	getParameters (const RooArgSet *observables, bool stripDisconnected=true) const
	Create a list of leaf nodes in the arg tree starting with ourself as top node that don't match any of the names the args in the supplied argset.
virtual bool	getParameters (const RooArgSet *observables, RooArgSet &outputSet, bool stripDisconnected=true) const
	Fills a list with leaf nodes in the arg tree starting with ourself as top node that don't match any of the names the args in the supplied argset.
RooAbsProxy *	getProxy (Int_t index) const
	Return the nth proxy from the proxy list.
const Text_t *	getStringAttribute (const Text_t *key) const
	Get string attribute mapped under key 'key'.
bool	getTransientAttribute (const Text_t *name) const
	Check if a named attribute is set.
RooFit::OwningPtr< RooArgSet >	getVariables (bool stripDisconnected=true) const
	Return RooArgSet with all variables (tree leaf nodes of expresssion tree)
void	graphVizTree (const char *fileName, const char *delimiter="\n", bool useTitle=false, bool useLatex=false)
	Create a GraphViz .dot file visualizing the expression tree headed by this RooAbsArg object.
void	graphVizTree (std::ostream &os, const char *delimiter="\n", bool useTitle=false, bool useLatex=false)
	Write the GraphViz representation of the expression tree headed by this RooAbsArg object to the given ostream.
bool	hasClients () const
bool	hasDataToken () const
virtual bool	hasRange (const char *) const
virtual bool	importWorkspaceHook (RooWorkspace &ws)
virtual bool	inRange (const char *) const
virtual bool	isCategory () const
bool	isCloneOf (const RooAbsArg &other) const
	Check if this object was created as a clone of 'other'.
bool	isConstant () const
	Check if the "Constant" attribute is set.
virtual bool	isDerived () const
	Does value or shape of this arg depend on any other arg?
virtual bool	isIdentical (const RooAbsArg &other, bool assumeSameType=false) const =0
virtual bool	isReducerNode () const
bool	IsSortable () const override
bool	localNoDirtyInhibit () const
const TNamed *	namePtr () const
	De-duplicated pointer to this object's name.
Int_t	numProxies () const
	Return the number of registered proxies.
bool	observableOverlaps (const RooAbsData *dset, const RooAbsArg &testArg) const
	Test if any of the dependents of the arg tree (as determined by getObservables) overlaps with those of the testArg.
bool	observableOverlaps (const RooArgSet *depList, const RooAbsArg &testArg) const
	Test if any of the dependents of the arg tree (as determined by getObservables) overlaps with those of the testArg.
RooAbsArg &	operator= (const RooAbsArg &other)=delete
virtual bool	operator== (const RooAbsArg &other) const =0
bool	overlaps (const RooAbsArg &testArg, bool valueOnly=false) const
	Test if any of the nodes of tree are shared with that of the given tree.
const RooArgSet *	ownedComponents () const
void	Print (Option_t *options=nullptr) const override
	Print the object to the defaultPrintStream().
void	printAddress (std::ostream &os) const override
	Print class name of object.
void	printArgs (std::ostream &os) const override
	Print object arguments, ie its proxies.
void	printClassName (std::ostream &os) const override
	Print object class name.
void	printCompactTree (const char *indent="", const char *fileName=nullptr, const char *namePat=nullptr, RooAbsArg *client=nullptr)
	Print tree structure of expression tree on stdout, or to file if filename is specified.
void	printCompactTree (std::ostream &os, const char *indent="", const char *namePat=nullptr, RooAbsArg *client=nullptr)
	Print tree structure of expression tree on given ostream.
virtual void	printCompactTreeHook (std::ostream &os, const char *ind="")
	Hook function interface for object to insert additional information when printed in the context of a tree structure.
void	printComponentTree (const char *indent="", const char *namePat=nullptr, Int_t nLevel=999)
	Print tree structure of expression tree on given ostream, only branch nodes are printed.
void	printDirty (bool depth=true) const
	Print information about current value dirty state information.
virtual void	printMetaArgs (std::ostream &) const
void	printMultiline (std::ostream &os, Int_t contents, bool verbose=false, TString indent="") const override
	Implement multi-line detailed printing.
void	printName (std::ostream &os) const override
	Print object name.
void	printTitle (std::ostream &os) const override
	Print object title.
void	printTree (std::ostream &os, TString indent="") const override
	Print object tree structure.
virtual bool	readFromStream (std::istream &is, bool compact, bool verbose=false)=0
bool	recursiveCheckObservables (const RooArgSet *nset) const
	Recursively call checkObservables on all nodes in the expression tree.
void	removeStringAttribute (const Text_t *key)
	Delete a string attribute with a given key.
void	resetDataToken ()
void	setAttribute (const Text_t *name, bool value=true)
	Set (default) or clear a named boolean attribute of this object.
void	setDataToken (std::size_t index)
	Sets the token for retrieving results in the BatchMode. For internal use only.
void	setLocalNoDirtyInhibit (bool flag) const
void	SetName (const char *name) override
	Set the name of the TNamed.
void	SetNameTitle (const char *name, const char *title) override
	Set all the TNamed parameters (name and title).
void	setProhibitServerRedirect (bool flag)
void	setStringAttribute (const Text_t *key, const Text_t *value)
	Associate string 'value' to this object under key 'key'.
void	setTransientAttribute (const Text_t *name, bool value=true)
	Set (default) or clear a named boolean attribute of this object.
void	setWorkspace (RooWorkspace &ws)
const std::map< std::string, std::string > &	stringAttributes () const
const std::set< std::string > &	transientAttributes () const
virtual void	translate (RooFit::Detail::CodeSquashContext &ctx) const
	This function defines a translation for each RooAbsReal based object that can be used to express the class as simple C++ code.
RooWorkspace *	workspace () const
virtual void	writeToStream (std::ostream &os, bool compact) const =0
TIterator *	clientIterator () const
	Retrieve a client iterator.
TIterator *	valueClientIterator () const
TIterator *	shapeClientIterator () const
TIterator *	serverIterator () const
RooFIter	valueClientMIterator () const
RooFIter	shapeClientMIterator () const
RooFIter	serverMIterator () const
RooFit::OwningPtr< RooArgSet >	getDependents (const RooArgSet &set) const
RooFit::OwningPtr< RooArgSet >	getDependents (const RooAbsData *set) const
RooFit::OwningPtr< RooArgSet >	getDependents (const RooArgSet *depList) const
bool	dependentOverlaps (const RooAbsData *dset, const RooAbsArg &testArg) const
bool	dependentOverlaps (const RooArgSet *depList, const RooAbsArg &testArg) const
bool	checkDependents (const RooArgSet *nset) const
bool	recursiveCheckDependents (const RooArgSet *nset) const
const RefCountList_t &	clients () const
	List of all clients of this object.
const RefCountList_t &	valueClients () const
	List of all value clients of this object. Value clients receive value updates.
const RefCountList_t &	shapeClients () const
	List of all shape clients of this object.
const RefCountList_t &	servers () const
	List of all servers of this object.
RooAbsArg *	findServer (const char *name) const
	Return server of this with name name. Returns nullptr if not found.
RooAbsArg *	findServer (const RooAbsArg &arg) const
	Return server of this that has the same name as arg. Returns nullptr if not found.
RooAbsArg *	findServer (Int_t index) const
	Return i-th server from server list.
bool	isValueServer (const RooAbsArg &arg) const
	Check if this is serving values to arg.
bool	isValueServer (const char *name) const
	Check if this is serving values to an object with name name.
bool	isShapeServer (const RooAbsArg &arg) const
	Check if this is serving shape to arg.
bool	isShapeServer (const char *name) const
	Check if this is serving shape to an object with name name.
void	leafNodeServerList (RooAbsCollection *list, const RooAbsArg *arg=nullptr, bool recurseNonDerived=false) const
	Fill supplied list with all leaf nodes of the arg tree, starting with ourself as top node.
void	branchNodeServerList (RooAbsCollection *list, const RooAbsArg *arg=nullptr, bool recurseNonDerived=false) const
	Fill supplied list with all branch nodes of the arg tree starting with ourself as top node.
void	treeNodeServerList (RooAbsCollection *list, const RooAbsArg *arg=nullptr, bool doBranch=true, bool doLeaf=true, bool valueOnly=false, bool recurseNonDerived=false) const
	Fill supplied list with nodes of the arg tree, following all server links, starting with ourself as top node.
virtual bool	isFundamental () const
	Is this object a fundamental type that can be added to a dataset? Fundamental-type subclasses override this method to return true.
virtual bool	isLValue () const
	Is this argument an l-value, i.e., can it appear on the left-hand side of an assignment expression? LValues are also special since they can potentially be analytically integrated and generated.
bool	redirectServers (const RooAbsCollection &newServerList, bool mustReplaceAll=false, bool nameChange=false, bool isRecursionStep=false)
	Replace all direct servers of this object with the new servers in newServerList.
bool	redirectServers (std::unordered_map< RooAbsArg *, RooAbsArg * > const &replacements)
	Replace some servers of this object.
bool	recursiveRedirectServers (const RooAbsCollection &newServerList, bool mustReplaceAll=false, bool nameChange=false, bool recurseInNewSet=true)
	Recursively replace all servers with the new servers in newSet.
virtual void	serverNameChangeHook (const RooAbsArg *, const RooAbsArg *)
void	addServer (RooAbsArg &server, bool valueProp=true, bool shapeProp=false, std::size_t refCount=1)
	Register another RooAbsArg as a server to us, ie, declare that we depend on it.
void	addServerList (RooAbsCollection &serverList, bool valueProp=true, bool shapeProp=false)
	Register a list of RooAbsArg as servers to us by calling addServer() for each arg in the list.
void	replaceServer (RooAbsArg &oldServer, RooAbsArg &newServer, bool valueProp, bool shapeProp)
	Replace 'oldServer' with 'newServer', specifying whether the new server has value or shape server properties.
void	changeServer (RooAbsArg &server, bool valueProp, bool shapeProp)
	Change dirty flag propagation mask for specified server.
void	removeServer (RooAbsArg &server, bool force=false)
	Unregister another RooAbsArg as a server to us, ie, declare that we no longer depend on its value and shape.
RooAbsArg *	findNewServer (const RooAbsCollection &newSet, bool nameChange) const
	Find the new server in the specified set that matches the old server.
virtual void	optimizeCacheMode (const RooArgSet &observables)
	Activate cache mode optimization with given definition of observables.
virtual void	optimizeCacheMode (const RooArgSet &observables, RooArgSet &optNodes, RooLinkedList &processedNodes)
	Activate cache mode optimization with given definition of observables.
bool	findConstantNodes (const RooArgSet &observables, RooArgSet &cacheList)
	Find branch nodes with all-constant parameters, and add them to the list of nodes that can be cached with a dataset in a test statistic calculation.
bool	findConstantNodes (const RooArgSet &observables, RooArgSet &cacheList, RooLinkedList &processedNodes)
	Find branch nodes with all-constant parameters, and add them to the list of nodes that can be cached with a dataset in a test statistic calculation.
virtual CacheMode	canNodeBeCached () const
virtual void	setCacheAndTrackHints (RooArgSet &)
bool	isShapeDirty () const
bool	isValueDirty () const
bool	isValueDirtyAndClear () const
bool	isValueOrShapeDirtyAndClear () const
void	registerCache (RooAbsCache &cache)
	Register RooAbsCache with this object.
void	unRegisterCache (RooAbsCache &cache)
	Unregister a RooAbsCache. Called from the RooAbsCache destructor.
Int_t	numCaches () const
	Return number of registered caches.
RooAbsCache *	getCache (Int_t index) const
	Return registered cache object by index.
OperMode	operMode () const
	Query the operation mode of this node.
void	setOperMode (OperMode mode, bool recurseADirty=true)
	Set the operation mode of this node.
void	setValueDirty ()
	Mark the element dirty. This forces a re-evaluation when a value is requested.
void	setShapeDirty ()
	Notify that a shape-like property (e.g. binning) has changed.
const char *	aggregateCacheUniqueSuffix () const
void	wireAllCaches ()
RooExpensiveObjectCache &	expensiveObjectCache () const
virtual void	setExpensiveObjectCache (RooExpensiveObjectCache &cache)
Public Member Functions inherited from TNamed
	TNamed ()
	TNamed (const char *name, const char *title)
	TNamed (const TNamed &named)
	TNamed copy ctor.
	TNamed (const TString &name, const TString &title)
virtual	~TNamed ()
	TNamed destructor.
void	Clear (Option_t *option="") override
	Set name and title to empty strings ("").
TObject *	Clone (const char *newname="") const override
	Make a clone of an object using the Streamer facility.
Int_t	Compare (const TObject *obj) const override
	Compare two TNamed objects.
void	Copy (TObject &named) const override
	Copy this to obj.
virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer.
const char *	GetName () const override
	Returns name of object.
const char *	GetTitle () const override
	Returns title of object.
ULong_t	Hash () const override
	Return hash value for this object.
TClass *	IsA () const override
Bool_t	IsSortable () const override
void	ls (Option_t *option="") const override
	List TNamed name and title.
TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator.
void	Print (Option_t *option="") const override
	Print TNamed name and title.
virtual void	SetName (const char *name)
	Set the name of the TNamed.
virtual void	SetNameTitle (const char *name, const char *title)
	Set all the TNamed parameters (name and title).
virtual void	SetTitle (const char *title="")
	Set the title of the TNamed.
virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject.
void	Streamer (TBuffer &) override
	Stream an object of class TObject.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.
	TObject (const TObject &object)
	TObject copy ctor.
virtual	~TObject ()
	TObject destructor.
void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract.
virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.
virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action.
ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.
virtual const char *	ClassName () const
	Returns name of class to which the object belongs.
virtual void	Clear (Option_t *="")
virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility.
virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method.
virtual void	Copy (TObject &object) const
	Copy this to obj.
virtual void	Delete (Option_t *option="")
	Delete this object.
virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object.
virtual void	Draw (Option_t *option="")
	Default Draw method for all objects.
virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.
virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).
virtual void	Dump () const
	Dump contents of object on stdout.
virtual void	Error (const char *method, const char *msgfmt,...) const
	Issue error message.
virtual void	Execute (const char *method, const char *params, Int_t *error=nullptr)
	Execute method on this object with the given parameter string, e.g.
virtual void	Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr)
	Execute method on this object with parameters stored in the TObjArray.
virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py).
virtual void	Fatal (const char *method, const char *msgfmt,...) const
	Issue fatal error message.
virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes.
virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes.
virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.
virtual const char *	GetIconName () const
	Returns mime type name of object.
virtual const char *	GetName () const
	Returns name of object.
virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py).
virtual Option_t *	GetOption () const
virtual const char *	GetTitle () const
	Returns title of object.
virtual UInt_t	GetUniqueID () const
	Return the unique object id.
virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.
virtual ULong_t	Hash () const
	Return hash value for this object.
Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.
virtual void	Info (const char *method, const char *msgfmt,...) const
	Issue info message.
virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname".
virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl.
virtual void	Inspect () const
	Dump contents of this object in a graphics canvas.
void	InvertBit (UInt_t f)
virtual TClass *	IsA () const
Bool_t	IsDestructed () const
	IsDestructed.
virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory).
virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
R__ALWAYS_INLINE Bool_t	IsOnHeap () const
virtual Bool_t	IsSortable () const
R__ALWAYS_INLINE Bool_t	IsZombie () const
virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout.
void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).
virtual Bool_t	Notify ()
	This method must be overridden to handle object notification.
void	Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete.
void	operator delete (void *ptr)
	Operator delete.
void	operator delete[] (void *ptr)
	Operator delete [].
void *	operator new (size_t sz)
void *	operator new (size_t sz, void *vp)
void *	operator new[] (size_t sz)
void *	operator new[] (size_t sz, void *vp)
TObject &	operator= (const TObject &rhs)
	TObject assignment operator.
virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself.
virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.
virtual void	Print (Option_t *option="") const
	This method must be overridden when a class wants to print itself.
virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.
virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list.
void	ResetBit (UInt_t f)
virtual void	SaveAs (const char *filename="", Option_t *option="") const
	Save this object in the file specified by filename.
virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out".
void	SetBit (UInt_t f)
void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f.
virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.
virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id.
virtual void	Streamer (TBuffer &)
	Stream an object of class TObject.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
virtual void	SysError (const char *method, const char *msgfmt,...) const
	Issue system error message.
R__ALWAYS_INLINE Bool_t	TestBit (UInt_t f) const
Int_t	TestBits (UInt_t f) const
virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.
virtual void	Warning (const char *method, const char *msgfmt,...) const
	Issue warning message.
virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.
virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.
Public Member Functions inherited from RooPrintable
	RooPrintable ()
virtual	~RooPrintable ()
virtual Int_t	defaultPrintContents (Option_t *opt) const
	Default choice of contents to be printed (name and value)
virtual StyleOption	defaultPrintStyle (Option_t *opt) const
virtual TClass *	IsA () const
virtual void	printAddress (std::ostream &os) const
	Print class name of object.
virtual void	printArgs (std::ostream &os) const
	Interface for printing of object arguments.
virtual void	printClassName (std::ostream &os) const
	Print class name of object.
virtual void	printExtras (std::ostream &os) const
	Interface to print extras of object.
virtual void	printMultiline (std::ostream &os, Int_t contents, bool verbose=false, TString indent="") const
	Interface for detailed printing of object.
virtual void	printName (std::ostream &os) const
	Print name of object.
virtual void	printStream (std::ostream &os, Int_t contents, StyleOption style, TString indent="") const
	Print description of object on ostream, printing contents set by contents integer, which is interpreted as an OR of 'enum ContentsOptions' values and in the style given by 'enum StyleOption'.
virtual void	printTitle (std::ostream &os) const
	Print title of object.
virtual void	printTree (std::ostream &os, TString indent="") const
	Interface for tree structure printing of object.
virtual void	printValue (std::ostream &os) const
	Interface to print value of object.
virtual void	Streamer (TBuffer &)
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 Public Member Functions inherited from RooAbsOptTestStatistic
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
Static Public Member Functions inherited from RooAbsTestStatistic
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
Static Public Member Functions inherited from RooAbsReal
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static void	clearEvalErrorLog ()
	Clear the stack of evaluation error messages.
static const char *	DeclFileName ()
static RooNumIntConfig *	defaultIntegratorConfig ()
	Returns the default numeric integration configuration for all RooAbsReals.
static EvalErrorIter	evalErrorIter ()
static ErrorLoggingMode	evalErrorLoggingMode ()
	Return current evaluation error logging mode.
static bool	hideOffset ()
static void	logEvalError (const RooAbsReal *originator, const char *origName, const char *message, const char *serverValueString=nullptr)
	Interface to insert remote error logging messages received by RooRealMPFE into current error loggin stream.
static Int_t	numEvalErrorItems ()
static Int_t	numEvalErrors ()
	Return the number of logged evaluation errors since the last clearing.
static void	printEvalErrors (std::ostream &os=std::cout, Int_t maxPerNode=10000000)
	Print all outstanding logged evaluation error on the given ostream.
static void	setEvalErrorLoggingMode (ErrorLoggingMode m)
	Set evaluation error logging mode.
static void	setHideOffset (bool flag)
Static Public Member Functions inherited from RooAbsArg
static void	setDirtyInhibit (bool flag)
	Control global dirty inhibit mode.
static void	verboseDirty (bool flag)
	Activate verbose messaging related to dirty flag propagation.
Static Public Member Functions inherited from TNamed
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
Static Public Member Functions inherited from TObject
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
static Longptr_t	GetDtorOnly ()
	Return destructor only flag.
static Bool_t	GetObjectStat ()
	Get status of object stat flag.
static void	SetDtorOnly (void *obj)
	Set destructor only flag.
static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable.
Static Public Member Functions inherited from RooPrintable
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
static std::ostream &	defaultPrintStream (std::ostream *os=nullptr)
	Return a reference to the current default stream to use in Print().
static void	nameFieldLength (Int_t newLen)
	Set length of field reserved from printing name of RooAbsArgs in multi-line collection printing to given amount.

Protected Member Functions
double	evaluatePartition (std::size_t firstEvent, std::size_t lastEvent, std::size_t stepSize) const override
	Calculate chi^2 in partition from firstEvent to lastEvent using given stepSize Throughout the calculation, we use Kahan's algorithm for summing to prevent loss of precision - this is a factor four more expensive than straight addition, but since evaluating the PDF is usually much more expensive than that, we tolerate the additional cost...
Protected Member Functions inherited from RooAbsOptTestStatistic
virtual bool	allowFunctionCache ()
void	constOptimizeTestStatistic (ConstOpCode opcode, bool doAlsoTrackingOpt=true) override
	Driver function to propagate constant term optimizations in test statistic.
void	initSlave (RooAbsReal &real, RooAbsData &indata, const RooArgSet &projDeps, const char *rangeName, const char *addCoefRangeName)
void	optimizeCaching ()
	This method changes the value caching logic for all nodes that depends on any of the observables as defined by the given dataset.
void	optimizeConstantTerms (bool, bool=true)
	Driver function to activate global constant term optimization.
void	printCompactTreeHook (std::ostream &os, const char *indent="") override
	Catch print hook function and forward to function clone.
bool	redirectServersHook (const RooAbsCollection &newServerList, bool mustReplaceAll, bool nameChange, bool isRecursive) override
	Catch server redirect calls and forward to internal clone of function.
virtual RooArgSet	requiredExtraObservables () const
bool	setDataSlave (RooAbsData &data, bool cloneData=true, bool ownNewDataAnyway=false) override
	Change dataset that is used to given one.
Protected Member Functions inherited from RooAbsTestStatistic
double	evaluate () const override
	Calculate and return value of test statistic.
virtual double	evaluatePartition (std::size_t firstEvent, std::size_t lastEvent, std::size_t stepSize) const =0
virtual double	getCarry () const
bool	initialize ()
	One-time initialization of the test statistic.
void	initMPMode (RooAbsReal *real, RooAbsData *data, const RooArgSet *projDeps, std::string const &rangeName, std::string const &addCoefRangeName)
	Initialize multi-processor calculation mode.
void	initSimMode (RooSimultaneous *pdf, RooAbsData *data, const RooArgSet *projDeps, std::string const &rangeName, std::string const &addCoefRangeName)
	Initialize simultaneous p.d.f processing mode.
Int_t	numSets () const
void	printCompactTreeHook (std::ostream &os, const char *indent="") override
	Add extra information on component test statistics when printing itself as part of a tree structure.
virtual bool	processEmptyDataSets () const
bool	redirectServersHook (const RooAbsCollection &newServerList, bool mustReplaceAll, bool nameChange, bool isRecursive) override
	Forward server redirect calls to component test statistics.
virtual bool	setDataSlave (RooAbsData &, bool=true, bool=false)
void	setEventCount (Int_t nEvents)
void	setMPSet (Int_t setNum, Int_t numSets)
	Set MultiProcessor set number identification of this instance.
Int_t	setNum () const
void	setSimCount (Int_t simCount)
Protected Member Functions inherited from RooAbsReal
void	attachToTree (TTree &t, Int_t bufSize=32000) override
	Attach object to a branch of given TTree.
void	attachToVStore (RooVectorDataStore &vstore) override
RooFitResult *	chi2FitDriver (RooAbsReal &fcn, RooLinkedList &cmdList)
	Internal driver function for chi2 fits.
void	copyCache (const RooAbsArg *source, bool valueOnly=false, bool setValDirty=true) override
	Copy the cached value of another RooAbsArg to our cache.
RooFit::OwningPtr< RooAbsReal >	createIntObj (const RooArgSet &iset, const RooArgSet *nset, const RooNumIntConfig *cfg, const char *rangeName) const
	Internal utility function for createIntegral() that creates the actual integral object.
virtual double	evaluate () const =0
	Evaluate this PDF / function / constant. Needs to be overridden by all derived classes.
void	fillTreeBranch (TTree &t) override
	Fill the tree branch that associated with this object with its current value.
void	findInnerMostIntegration (const RooArgSet &allObs, RooArgSet &innerObs, const char *rangeName) const
	Utility function for createIntObj() that aids in the construct of recursive integrals over functions with multiple observables with parameterized ranges.
TString	integralNameSuffix (const RooArgSet &iset, const RooArgSet *nset=nullptr, const char *rangeName=nullptr, bool omitEmpty=false) const
	Construct std::string with unique suffix name to give to integral object that encodes integrated observables, normalization observables and the integration range name.
bool	isValid () const override
	Check if current value is valid.
virtual bool	isValidReal (double, bool printError=false) const
	Interface function to check if given value is a valid value for this object. Returns true unless overridden.
void	makeProjectionSet (const RooAbsArg *plotVar, const RooArgSet *allVars, RooArgSet &projectedVars, bool silent) const
	Utility function for plotOn() that constructs the set of observables to project when plotting ourselves as function of 'plotVar'.
bool	matchArgs (const RooArgSet &allDeps, RooArgSet &numDeps, const RooArgProxy &a) const
	Utility function for use in getAnalyticalIntegral().
bool	matchArgs (const RooArgSet &allDeps, RooArgSet &numDeps, const RooArgProxy &a, const RooArgProxy &b) const
	Utility function for use in getAnalyticalIntegral().
bool	matchArgs (const RooArgSet &allDeps, RooArgSet &numDeps, const RooArgProxy &a, const RooArgProxy &b, const RooArgProxy &c) const
	Utility function for use in getAnalyticalIntegral().
bool	matchArgs (const RooArgSet &allDeps, RooArgSet &numDeps, const RooArgProxy &a, const RooArgProxy &b, const RooArgProxy &c, const RooArgProxy &d) const
	Utility function for use in getAnalyticalIntegral().
bool	matchArgs (const RooArgSet &allDeps, RooArgSet &numDeps, const RooArgSet &set) const
	Utility function for use in getAnalyticalIntegral().
virtual RooPlot *	plotAsymOn (RooPlot *frame, const RooAbsCategoryLValue &asymCat, PlotOpt o) const
virtual RooPlot *	plotOn (RooPlot *frame, PlotOpt o) const
	Plotting engine function for internal use.
void	plotOnCompSelect (RooArgSet *selNodes) const
	Helper function for plotting of composite p.d.fs.
RooPlot *	plotOnWithErrorBand (RooPlot *frame, const RooFitResult &fr, double Z, const RooArgSet *params, const RooLinkedList &argList, bool method1) const
	Plot function or PDF on frame with support for visualization of the uncertainty encoded in the given fit result fr.
bool	plotSanityChecks (RooPlot *frame) const
	Utility function for plotOn(), perform general sanity check on frame to ensure safe plotting operations.
bool	redirectServersHook (const RooAbsCollection &newServerList, bool mustReplaceAll, bool nameChange, bool isRecursiveStep) override
	A buffer for reading values from trees.
virtual void	selectNormalization (const RooArgSet *depSet=nullptr, bool force=false)
	Interface function to force use of a given set of observables to interpret function value.
virtual void	selectNormalizationRange (const char *rangeName=nullptr, bool force=false)
	Interface function to force use of a given normalization range to interpret function value.
void	setTreeBranchStatus (TTree &t, bool active) override
	(De)Activate associated tree branch
void	syncCache (const RooArgSet *set=nullptr) override
double	traceEval (const RooArgSet *set) const
	Calculate current value of object, with error tracing wrapper.
Protected Member Functions inherited from RooAbsArg
void	attachToStore (RooAbsDataStore &store)
	Attach this argument to the data store such that it reads data from there.
virtual void	attachToTree (TTree &t, Int_t bufSize=32000)=0
	Overloadable function for derived classes to implement attachment as branch to a TTree.
virtual void	attachToVStore (RooVectorDataStore &vstore)=0
TString	cleanBranchName () const
	Construct a mangled name from the actual name that is free of any math symbols that might be interpreted by TTree.
void	clearShapeDirty () const
void	clearValueAndShapeDirty () const
void	clearValueDirty () const
virtual void	copyCache (const RooAbsArg *source, bool valueOnly=false, bool setValDirty=true)=0
virtual void	fillTreeBranch (TTree &t)=0
virtual void	getObservablesHook (const RooArgSet *, RooArgSet *) const
virtual void	getParametersHook (const RooArgSet *, RooArgSet *, bool) const
void	graphVizAddConnections (std::set< std::pair< RooAbsArg *, RooAbsArg * > > &)
	Utility function that inserts all point-to-point client-server connections between any two RooAbsArgs in the expression tree headed by this object in the linkSet argument.
bool	inhibitDirty () const
	Delete watch flag.
virtual void	ioStreamerPass2 ()
	Method called by workspace container to finalize schema evolution issues that cannot be handled in a single ioStreamer pass.
virtual bool	isValid () const
	WVE (08/21/01) Probably obsolete now.
virtual void	operModeHook ()
virtual void	optimizeDirtyHook (const RooArgSet *)
void	printAttribList (std::ostream &os) const
	Transient boolean attributes (not copied in ctor)
void	registerProxy (RooArgProxy &proxy)
	Register an RooArgProxy in the proxy list.
void	registerProxy (RooListProxy &proxy)
	Register an RooListProxy in the proxy list.
void	registerProxy (RooSetProxy &proxy)
	Register an RooSetProxy in the proxy list.
void	setProxyNormSet (const RooArgSet *nset)
	Forward a change in the cached normalization argset to all the registered proxies.
void	setShapeDirty (const RooAbsArg *source)
	Notify that a shape-like property (e.g. binning) has changed.
virtual void	setTreeBranchStatus (TTree &t, bool active)=0
void	setValueDirty (const RooAbsArg *source)
	Force element to re-evaluate itself when a value is requested.
virtual void	syncCache (const RooArgSet *nset=nullptr)=0
void	unRegisterProxy (RooArgProxy &proxy)
	Remove proxy from proxy list.
void	unRegisterProxy (RooListProxy &proxy)
	Remove proxy from proxy list.
void	unRegisterProxy (RooSetProxy &proxy)
	Remove proxy from proxy list.
Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char *location, const char *fmt, va_list va) const
	Interface to ErrorHandler (protected).
void	MakeZombie ()

Protected Attributes
RooDataHist::ErrorType	_etype
	Error type store in associated RooDataHist.
FuncMode	_funcMode
	Function, P.d.f. or extended p.d.f?
Protected Attributes inherited from RooAbsOptTestStatistic
RooArgSet	_cachedNodes
	! List of nodes that are cached as constant expressions
RooAbsData *	_dataClone {nullptr}
	Pointer to internal clone if input data.
RooAbsReal *	_funcClone
	Pointer to internal clone of input function.
RooArgSet *	_funcCloneSet
	Set owning all components of internal clone of input function.
RooArgSet *	_funcObsSet
	List of observables in the pdf expression.
double	_integrateBinsPrecision {-1.}
RooArgSet *	_normSet
	Pointer to set with observables used for normalization.
bool	_optimized
	!
RooAbsData *	_origData
	Original data.
RooAbsReal *	_origFunc
	Original function.
bool	_ownData
	Do we own the dataset.
RooArgSet *	_projDeps
	Set of projected observable.
bool	_sealed
	Is test statistic sealed – i.e. no access to data.
TString	_sealNotice
	User-defined notice shown when reading a sealed likelihood.
Protected Attributes inherited from RooAbsTestStatistic
std::string	_addCoefRangeName
	Name of reference to be used for RooAddPdf components.
RooAbsData *	_data = nullptr
	Pointer to original input dataset.
bool	_doOffset = false
	Apply interval value offset to control numeric precision?
double	_evalCarry = 0.0
	! carry of Kahan sum in evaluatePartition
Int_t	_extSet = 0
	! Number of designated set to calculated extended term
RooAbsReal *	_func = nullptr
	Pointer to original input function.
std::vector< std::unique_ptr< RooAbsTestStatistic > >	_gofArray
	! Array of sub-contexts representing part of the combined test statistic
GOFOpMode	_gofOpMode = Slave
	Operation mode of test statistic instance.
bool	_init = false
	! Is object initialized
pRooRealMPFE *	_mpfeArray = nullptr
	! Array of parallel execution frond ends
RooFit::MPSplit	_mpinterl = RooFit::BulkPartition
	Use interleaving strategy rather than N-wise split for partioning of dataset for multiprocessor-split.
Int_t	_nCPU = 1
	Number of processors to use in parallel calculation mode.
Int_t	_nEvents = 0
	Total number of events in test statistic calculation.
Int_t	_numSets = 1
	Total number of partitions in parallel calculation mode.
ROOT::Math::KahanSum< double >	_offset {0.0}
	! Offset as KahanSum to avoid loss of precision
RooSetProxy	_paramSet
	Parameters of the test statistic (=parameters of the input function)
const RooArgSet *	_projDeps = nullptr
	Pointer to set with projected observables.
std::string	_rangeName
	Name of range in which to calculate test statistic.
Int_t	_setNum = 0
	Partition number of this instance in parallel calculation mode.
Int_t	_simCount = 1
	Total number of component p.d.f.s in RooSimultaneous (if any)
bool	_splitRange = false
	Split rangeName in RooSimultaneous index labels if true.
const bool	_takeGlobalObservablesFromData = false
	If the global observable values are taken from data.
bool	_verbose = false
	Verbose messaging if true.
Protected Attributes inherited from RooAbsReal
bool	_forceNumInt = false
	Force numerical integration if flag set.
TString	_label
	Plot label for objects value.
RooFit::UniqueId< RooArgSet >::Value_t	_lastNormSetId = RooFit::UniqueId<RooArgSet>::nullval
	!
Int_t	_plotBins = 100
	Number of plot bins.
double	_plotMax = 0.0
	Maximum of plot range.
double	_plotMin = 0.0
	Minimum of plot range.
bool	_selectComp = true
std::unique_ptr< RooNumIntConfig >	_specIntegratorConfig
TString	_unit
	Unit for objects value.
double	_value = 0.0
	Cache for current value of object.
Protected Attributes inherited from RooAbsArg
std::set< std::string >	_boolAttrib
std::set< std::string >	_boolAttribTransient
std::vector< RooAbsCache * >	_cacheList
RefCountList_t	_clientList
RefCountList_t	_clientListShape
RefCountList_t	_clientListValue
std::size_t	_dataToken = std::numeric_limits<std::size_t>::max()
	In which workspace do I live, if any.
bool	_deleteWatch
RooExpensiveObjectCache *	_eocache {nullptr}
	Prohibit server redirects – Debugging tool.
bool	_fast = false
bool	_isConstant
	De-duplicated name pointer. This will be equal for all objects with the same name.
bool	_localNoInhibitDirty
	Cached isConstant status.
RooWorkspace *	_myws
	Prevent 'AlwaysDirty' mode for this node.
const TNamed *	_namePtr
	Pointer to global cache manager for any expensive components created by this object.
OperMode	_operMode
RooArgSet *	_ownedComponents
bool	_prohibitServerRedirect
	Set of owned component.
RooRefArray	_proxyList
ProxyListCache	_proxyListCache
RefCountList_t	_serverList
bool	_shapeDirty
std::map< std::string, std::string >	_stringAttrib
bool	_valueDirty
Protected Attributes inherited from TNamed
TString	fName
TString	fTitle

Static Protected Attributes
static RooArgSet	_emptySet
	Supports named argument constructor.
Static Protected Attributes inherited from RooAbsReal
static bool	_globalSelectComp = false
	Component selection flag for RooAbsPdf::plotCompOn.
static bool	_hideOffset = true
	Offset hiding flag.
Static Protected Attributes inherited from RooAbsArg
static bool	_inhibitDirty
static bool	_verboseDirty
	cache of the list of proxies. Avoids type casting.
Static Protected Attributes inherited from RooPrintable
static Int_t	_nameLength

Private Member Functions
	RooChi2Var (const char *name, const char *title, RooAbsReal &func, RooDataHist &data, const RooArgSet &projDeps, FuncMode funcMode, RooAbsTestStatistic::Configuration const &cfg, RooDataHist::ErrorType etype)

Additional Inherited Members
Protected Types inherited from TObject
enum	{ kOnlyPrepStep = (1ULL << ( 3 )) }
Static Protected Member Functions inherited from RooAbsReal
static void	globalSelectComp (bool flag)
	Global switch controlling the activation of the selectComp() functionality.
Static Protected Member Functions inherited from RooAbsArg
static void	ioStreamerPass2Finalize ()
	Method called by workspace container to finalize schema evolution issues that cannot be handled in a single ioStreamer pass.

#include <RooChi2Var.h>

Inheritance diagram for RooChi2Var:

Member Enumeration Documentation

FuncMode

enum RooChi2Var::FuncMode

Enumerator
Function
Pdf
ExtendedPdf

Definition at line 39 of file RooChi2Var.h.

Constructor & Destructor Documentation

RooChi2Var() [1/4]

RooChi2Var::RooChi2Var	(	const char *	name,
		const char *	title,
		RooAbsReal &	func,
		RooDataHist &	hdata,
		const RooCmdArg &	arg1 = RooCmdArg::none(),
		const RooCmdArg &	arg2 = RooCmdArg::none(),
		const RooCmdArg &	arg3 = RooCmdArg::none(),
		const RooCmdArg &	arg4 = RooCmdArg::none(),
		const RooCmdArg &	arg5 = RooCmdArg::none(),
		const RooCmdArg &	arg6 = RooCmdArg::none(),
		const RooCmdArg &	arg7 = RooCmdArg::none(),
		const RooCmdArg &	arg8 = RooCmdArg::none(),
		const RooCmdArg &	arg9 = RooCmdArg::none()
	)

RooChi2Var constructor.

Optional arguments are:

Parameters

[in]	name	Name of the PDF
[in]	title	Title for plotting etc.
[in]	func	Function
[in]	hdata	Data histogram
[in]	arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9	Optional arguments according to table below. Type of CmdArg Effect on \( \chi^2 \) DataError() Choose between: RooAbsData::Expected: Expected Poisson error ( \( \sqrt{n_\text{expected}} \) from the PDF). RooAbsData::SumW2: The observed error from the square root of the sum of weights, i.e., symmetric errors calculated with the standard deviation of a Poisson distribution. RooAbsData::Poisson: Asymmetric errors from the central 68 % interval around a Poisson distribution with mean \( n_\text{observed} \). If for a given bin \( n_\text{expected} \) is lower than the \( n_\text{observed} \), the lower uncertainty is taken (e.g., the difference between the mean and the 16 % quantile). If \( n_\text{expected} \) is higher than \( n_\text{observed} \), the higher uncertainty is taken (e.g., the difference between the 84 % quantile and the mean). RooAbsData::Auto (default): RooAbsData::Expected for unweighted data, RooAbsData::SumW2 for weighted data. Extended() Use expected number of events of an extended p.d.f as normalization NumCPU() Activate parallel processing feature Range() Calculate \( \chi^2 \) only in selected region Verbose() Verbose output of GOF framework IntegrateBins() Integrate PDF within each bin. This sets the desired precision. Only useful for binned fits. SumCoefRange() Set the range in which to interpret the coefficients of RooAddPdf components SplitRange() Fit ranges used in different categories get named after the category. Using Range("range"), SplitRange() as switches, different ranges could be set like this: myVariable.setRange("range_pi0", 135, 210); myVariable.setRange("range_gamma", 50, 210); ConditionalObservables(Args_t &&... argsOrArgSet) Define projected observables. Arguments can either be multiple RooRealVar or a single RooArgSet containing them.

Definition at line 138 of file RooChi2Var.cxx.

RooChi2Var() [2/4]

RooChi2Var::RooChi2Var	(	const char *	name,
		const char *	title,
		RooAbsPdf &	pdf,
		RooDataHist &	hdata,
		const RooCmdArg &	arg1 = RooCmdArg::none(),
		const RooCmdArg &	arg2 = RooCmdArg::none(),
		const RooCmdArg &	arg3 = RooCmdArg::none(),
		const RooCmdArg &	arg4 = RooCmdArg::none(),
		const RooCmdArg &	arg5 = RooCmdArg::none(),
		const RooCmdArg &	arg6 = RooCmdArg::none(),
		const RooCmdArg &	arg7 = RooCmdArg::none(),
		const RooCmdArg &	arg8 = RooCmdArg::none(),
		const RooCmdArg &	arg9 = RooCmdArg::none()
	)

RooChi2Var constructor.

Optional arguments taken

Parameters

[in]	name	Name of the PDF
[in]	title	Title for plotting etc.
[in]	pdf	PDF to fit
[in]	hdata	Data histogram
[in]	arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9	Optional arguments according to table below. Argument Effect Extended() Include extended term in calculation DataError() Choose between Poisson errors and Sum-of-weights errors NumCPU() Activate parallel processing feature Range() Fit only selected region SumCoefRange() Set the range in which to interpret the coefficients of RooAddPdf components SplitRange() Fit range is split by index category of simultaneous PDF ConditionalObservables() Define projected observables Verbose() Verbose output of GOF framework IntegrateBins() Integrate PDF within each bin. This sets the desired precision.

Definition at line 197 of file RooChi2Var.cxx.

RooChi2Var() [3/4]

RooChi2Var::RooChi2Var	(	const RooChi2Var &	other,
		const char *	name = nullptr
	)

Copy constructor.

Definition at line 226 of file RooChi2Var.cxx.

RooChi2Var() [4/4]

RooChi2Var::RooChi2Var ( const char *  name, const char *  title, RooAbsReal &  func, RooDataHist &  data, const RooArgSet &  projDeps, FuncMode  funcMode, RooAbsTestStatistic::Configuration const &  cfg, RooDataHist::ErrorType  etype  )

inlineprivate

Definition at line 57 of file RooChi2Var.h.

Member Function Documentation

Class()

static TClass * RooChi2Var::Class ( )

static

Returns

TClass describing this class

Class_Name()

static const char * RooChi2Var::Class_Name ( )

static

Returns

Name of this class

Class_Version()

static constexpr Version_t RooChi2Var::Class_Version ( )

inlinestaticconstexpr

Returns

Version of this class

Definition at line 72 of file RooChi2Var.h.

clone()

TObject * RooChi2Var::clone ( const char *  newname ) const

inlineoverridevirtual

Implements RooAbsArg.

Definition at line 42 of file RooChi2Var.h.

create()

RooAbsTestStatistic * RooChi2Var::create ( const char *  name, const char *  title, RooAbsReal &  pdf, RooAbsData &  dhist, const RooArgSet &  projDeps, RooAbsTestStatistic::Configuration const &  cfg  )

inlineoverridevirtual

Implements RooAbsTestStatistic.

Definition at line 44 of file RooChi2Var.h.

DeclFileName()

static const char * RooChi2Var::DeclFileName ( )

inlinestatic

Returns

Name of the file containing the class declaration

Definition at line 72 of file RooChi2Var.h.

defaultErrorLevel()

double RooChi2Var::defaultErrorLevel ( ) const

inlineoverridevirtual

Reimplemented from RooAbsReal.

Definition at line 50 of file RooChi2Var.h.

evaluatePartition()

double RooChi2Var::evaluatePartition ( std::size_t  firstEvent, std::size_t  lastEvent, std::size_t  stepSize  ) const

overrideprotectedvirtual

Calculate chi^2 in partition from firstEvent to lastEvent using given stepSize Throughout the calculation, we use Kahan's algorithm for summing to prevent loss of precision - this is a factor four more expensive than straight addition, but since evaluating the PDF is usually much more expensive than that, we tolerate the additional cost...

Implements RooAbsTestStatistic.

Definition at line 241 of file RooChi2Var.cxx.

IsA()

TClass * RooChi2Var::IsA ( ) const

inlineoverridevirtual

Returns

TClass describing current object

Reimplemented from RooAbsOptTestStatistic.

Definition at line 72 of file RooChi2Var.h.

Streamer()

void RooChi2Var::Streamer ( TBuffer &  R__b )

overridevirtual

Stream an object of class TObject.

Reimplemented from RooAbsOptTestStatistic.

StreamerNVirtual()

void RooChi2Var::StreamerNVirtual ( TBuffer &  ClassDef_StreamerNVirtual_b )

inline

Definition at line 72 of file RooChi2Var.h.

Member Data Documentation

_emptySet

RooArgSet RooChi2Var::_emptySet

staticprotected

Supports named argument constructor.

Definition at line 67 of file RooChi2Var.h.

_etype

RooDataHist::ErrorType RooChi2Var::_etype

protected

Error type store in associated RooDataHist.

Definition at line 69 of file RooChi2Var.h.

_funcMode

FuncMode RooChi2Var::_funcMode

protected

Function, P.d.f. or extended p.d.f?

Definition at line 70 of file RooChi2Var.h.

Libraries for RooChi2Var:

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

• roofit/roofitcore/inc/RooChi2Var.h
• roofit/roofitcore/src/RooChi2Var.cxx