RooFFTConvPdf Class Reference

PDF for the numerical (FFT) convolution of two PDFs.

This class implements a generic one-dimensional numeric convolution of two PDFs, and can convolve any two RooAbsPdfs.

The class exploits the convolution theorem

\[ f(x) * g(x) \rightarrow F(k_i) \cdot G(k_i) \]

to calculate the convolution by calculating a Real->Complex FFT of both input PDFs, multiplying the complex coefficients and performing the reverse Complex->Real FFT to get the result in the input space. This class uses the ROOT FFT interface to the (free) FFTW3 package (www.fftw.org), and requires that your ROOT installation is compiled with the fftw3=ON (default). Instructions for manually installing fftw below.

Note that the performance in terms of speed and stability of RooFFTConvPdf is vastly superior to that of RooNumConvPdf.

An important feature of FFT convolutions is that the observable is assumed to be cyclical. This is correct for cyclical observables such as angles, but does not hold in general. For non-cyclical variables, wrap-around artifacts may be encountered, e.g. if the PDF is zero at xMin and non-zero at xMax. A rising tail may appear at xMin. This is inevitable when using FFTs. A distribution with 3 bins therefore looks like:

... 0 1 2 0 1 2 0 1 2 ...

Therefore, if bins 0 and 2 are not equal, the FFT sees a cyclical function with a step at the 2|0 boundary, which causes artifacts in Fourier space.

The spillover or discontinuity can be reduced or eliminated by introducing a buffer zone in the FFT calculation. If this feature is activated (on by default), the sampling array for the FFT calculation is extended in both directions, and padded with the lowest/highest bin. Example:

original:                -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5
add buffer zones:    U U -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 O O
rotate:              0 +1 +2 +3 +4 +5 O O U U -5 -4 -3 -2 -1

The buffer bins are stripped away when the FFT output values are transferred back to the p.d.f cache. The default buffer size is 10% of the observable domain size, and can be changed with the setBufferFraction() member function.

The RooFFTConvPdf uses caching inherited from a RooAbsCachedPdf. If it is evaluated for a particular value of x, the FFT and convolution is calculated for all bins in the observable space for the given choice of parameters, which are also stored in the cache. Subsequent evaluations for different values of the convolution observable and identical parameters will be retrieved from the cache. If one or more of the parameters change, the cache will be updated, i.e., a new FFT runs.

The sampling density of the FFT is controlled by the binning of the the convolution observable, which can be changed using RooRealVar::setBins(N). For good results, N should be large (>=1000). Additional interpolation between the bins may improve the result if coarse binnings are chosen. These can be activated in the constructor or by calling setInterpolationOrder(). For N >> 1000, interpolation will not substantially improve the accuracy.

Additionial information on caching can be displayed by monitoring the message stream with topic "Caching" at the INFO level, i.e. by calling RooMsgService::instance().addStream(RooMsgService::INFO,Topic("Caching")) to see these message on stdout.

Multi-dimensional convolutions are not supported at the moment.

---

Installing an external version of FFTW on Linux and compiling ROOT to use it

You have two options:

• Recommended: ROOT can automatically install FFTW for itself, see builtin_fftw3 at https://root.cern.ch/building-root
• Install FFTW and let ROOT discover it. fftw3 is on by default (see https://root.cern.ch/building-root)

1) Go to www.fftw.org and download the latest stable version (a .tar.gz file)

If you have root access to your machine and want to make a system installation of FFTW

2) Untar fftw-XXX.tar.gz in /tmp, cd into the untarred directory and type './configure' followed by 'make install'. This will install fftw in /usr/local/bin,lib etc...

3) Start from a source installation of ROOT. ROOT should discover it. See https://root.cern.ch/building-root

If you do not have root access and want to make a private installation of FFTW

2) Make a private install area for FFTW, e.g. /home/myself/fftw

3) Untar fftw-XXX.tar.gz in /tmp, cd into the untarred directory and type './configure –prefix=/home/myself/fftw' followed by 'make install'. Substitute /home/myself/fftw with a directory of your choice. This procedure will install FFTW in the location designated by you

4) Start from a source installation of ROOT. Look up and set the proper paths for ROOT to discover FFTW. See https://root.cern.ch/building-root

Definition at line 25 of file RooFFTConvPdf.h.

Classes
class	FFTCacheElem

Public Types
enum	BufStrat { Extend =0 , Mirror =1 , Flat =2 }
Public Types inherited from RooAbsCachedPdf
using	CacheElem = PdfCacheElem
Public Types inherited from RooAbsPdf
enum	ExtendMode { CanNotBeExtended , CanBeExtended , MustBeExtended }
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
	RooFFTConvPdf ()
	RooFFTConvPdf (const char *name, const char *title, RooAbsReal &pdfConvVar, RooRealVar &convVar, RooAbsPdf &pdf1, RooAbsPdf &pdf2, Int_t ipOrder=2)
	Constructor for numerical (FFT) convolution of PDFs.
	RooFFTConvPdf (const char *name, const char *title, RooRealVar &convVar, RooAbsPdf &pdf1, RooAbsPdf &pdf2, Int_t ipOrder=2)
	Constructor for numerical (FFT) convolution of PDFs.
	RooFFTConvPdf (const RooFFTConvPdf &other, const char *name=nullptr)
	Copy constructor.
	~RooFFTConvPdf () override
	Destructor.
double	bufferFraction () const
	Return value of buffer fraction applied in FFT calculation array beyond either end of the observable domain to reduce cyclical effects.
BufStrat	bufferStrategy () const
	Return the strategy currently used to fill the buffer: 'Extend' means is that the input p.d.f convolution observable range is widened to include the buffer range 'Flat' means that the buffer is filled with the p.d.f.
const RooArgSet &	cacheObservables () const
TObject *	clone (const char *newname) const override
Int_t	getMaxVal (const RooArgSet &vars) const override
	Advertise capability to determine maximum value of function for given set of observables.
TClass *	IsA () const override
double	maxVal (Int_t code) const override
	Return maximum value for set of observables identified by code assigned in getMaxVal.
void	printMetaArgs (std::ostream &os) const override
	Customized printing of arguments of a RooNumConvPdf to more intuitively reflect the contents of the product operator construction.
void	setBufferFraction (double frac)
	Change the size of the buffer on either side of the observable range to frac times the size of the range of the convolution observable.
void	setBufferStrategy (BufStrat bs)
	Change strategy to fill the overflow buffer on either side of the convolution observable range.
void	setCacheObservables (const RooArgSet &obs)
void	setShift (double val1, double val2)
void	Streamer (TBuffer &) override
	Stream an object of class TObject.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
Public Member Functions inherited from RooAbsCachedPdf
	RooAbsCachedPdf ()
	RooAbsCachedPdf (const char *name, const char *title, int ipOrder=0)
	Constructor.
	RooAbsCachedPdf (const RooAbsCachedPdf &other, const char *name=nullptr)
	Copy constructor.
double	analyticalIntegralWN (Int_t code, const RooArgSet *normSet, const char *rangeName=nullptr) const override
	Implements internal (analytical) integration capabilities.
std::unique_ptr< RooAbsArg >	compileForNormSet (RooArgSet const &normSet, RooFit::Detail::CompileContext &ctx) const override
bool	forceAnalyticalInt (const RooAbsArg &dep) const override
	Force RooRealIntegral to offer all our actual observable for internal integration.
Int_t	getAnalyticalIntegralWN (RooArgSet &allVars, RooArgSet &analVars, const RooArgSet *normSet, const char *rangeName=nullptr) const override
	Advertises internal (analytical) integration capabilities.
RooDataHist *	getCacheHist (const RooArgSet &nset) const
RooDataHist *	getCacheHist (const RooArgSet *nset=nullptr) const
	Return pointer to RooDataHist cache histogram for given choice of observables.
RooAbsPdf *	getCachePdf (const RooArgSet &nset) const
RooAbsPdf *	getCachePdf (const RooArgSet *nset=nullptr) const
	Return pointer to RooHistPdf cache pdf for given choice of observables.
Int_t	getInterpolationOrder () const
double	getValV (const RooArgSet *set=nullptr) const override
	Implementation of getVal() overriding default implementation of RooAbsPdf.
bool	selfNormalized () const override
	Shows if a PDF is self-normalized, which means that no attempt is made to add a normalization term.
void	setInterpolationOrder (int order)
	Change the interpolation order that is used in RooHistPdf cache representation smoothing the RooDataHist shapes.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
Public Member Functions inherited from RooAbsPdf
	RooAbsPdf ()
	Default constructor.
	RooAbsPdf (const char *name, const char *title, double minVal, double maxVal)
	Constructor with name, title, and plot range.
	RooAbsPdf (const char *name, const char *title=nullptr)
	Constructor with name and title only.
	~RooAbsPdf () override
	Destructor.
double	analyticalIntegralWN (Int_t code, const RooArgSet *normSet, const char *rangeName=nullptr) const override
	Analytical integral with normalization (see RooAbsReal::analyticalIntegralWN() for further information).
virtual RooAbsGenContext *	autoGenContext (const RooArgSet &vars, const RooDataSet *prototype=nullptr, const RooArgSet *auxProto=nullptr, bool verbose=false, bool autoBinned=true, const char *binnedTag="") const
virtual RooAbsGenContext *	binnedGenContext (const RooArgSet &vars, bool verbose=false) const
	Return a binned generator context.
bool	canBeExtended () const
	If true, PDF can provide extended likelihood term.
std::unique_ptr< RooAbsArg >	compileForNormSet (RooArgSet const &normSet, RooFit::Detail::CompileContext &ctx) const override
RooFit::OwningPtr< RooAbsReal >	createCdf (const RooArgSet &iset, const RooArgSet &nset=RooArgSet())
	Create a cumulative distribution function of this p.d.f in terms of the observables listed in iset.
RooFit::OwningPtr< RooAbsReal >	createCdf (const RooArgSet &iset, const RooCmdArg &arg1, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={})
	Create an object that represents the integral of the function over one or more observables listed in iset.
virtual std::unique_ptr< RooAbsReal >	createExpectedEventsFunc (const RooArgSet *nset) const
	Returns an object that represents the expected number of events for a given normalization set, similar to how createIntegral() returns an object that returns the integral.
template<typename... CmdArgs_t>
RooFit::OwningPtr< RooAbsReal >	createNLL (RooAbsData &data, CmdArgs_t const &... cmdArgs)
	Construct representation of -log(L) of PDF with given dataset.
virtual RooAbsPdf *	createProjection (const RooArgSet &iset)
	Return a p.d.f that represent a projection of this p.d.f integrated over given observables.
RooFit::OwningPtr< RooAbsReal >	createScanCdf (const RooArgSet &iset, const RooArgSet &nset, Int_t numScanBins, Int_t intOrder)
double	expectedEvents (const RooArgSet &nset) const
	Return expected number of events to be used in calculation of extended likelihood.
virtual double	expectedEvents (const RooArgSet *nset) const
	Return expected number of events to be used in calculation of extended likelihood.
double	extendedTerm (double sumEntries, double expected, double sumEntriesW2=0.0, bool doOffset=false) const
double	extendedTerm (double sumEntries, RooArgSet const *nset, double sumEntriesW2=0.0, bool doOffset=false) const
	Return the extended likelihood term ( \( N_\mathrm{expect} - N_\mathrm{observed} \cdot \log(N_\mathrm{expect} \)) of this PDF for the given number of observed events.
double	extendedTerm (RooAbsData const &data, bool weightSquared, bool doOffset=false) const
	Return the extended likelihood term ( \( N_\mathrm{expect} - N_\mathrm{observed} \cdot \log(N_\mathrm{expect} \)) of this PDF for the given number of observed events.
virtual ExtendMode	extendMode () const
	Returns ability of PDF to provide extended likelihood terms.
template<typename... CmdArgs_t>
RooFit::OwningPtr< RooFitResult >	fitTo (RooAbsData &data, CmdArgs_t const &... cmdArgs)
	Fit PDF to given dataset.
RooFit::OwningPtr< RooDataSet >	generate (const RooArgSet &whatVars, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={})
	Generate a new dataset containing the specified variables with events sampled from our distribution.
RooFit::OwningPtr< RooDataSet >	generate (const RooArgSet &whatVars, const RooDataSet &prototype, Int_t nEvents=0, bool verbose=false, bool randProtoOrder=false, bool resampleProto=false) const
	Generate a new dataset using a prototype dataset as a model, with values of the variables in whatVars sampled from our distribution.
RooFit::OwningPtr< RooDataSet >	generate (const RooArgSet &whatVars, double nEvents=0, bool verbose=false, bool autoBinned=true, const char *binnedTag="", bool expectedData=false, bool extended=false) const
	Generate a new dataset containing the specified variables with events sampled from our distribution.
RooFit::OwningPtr< RooDataSet >	generate (const RooArgSet &whatVars, Int_t nEvents, const RooCmdArg &arg1, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={})
	See RooAbsPdf::generate(const RooArgSet&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&,const RooCmdArg&)
RooFit::OwningPtr< RooDataSet >	generate (GenSpec &) const
	Generate according to GenSpec obtained from prepareMultiGen().
virtual RooFit::OwningPtr< RooDataHist >	generateBinned (const RooArgSet &whatVars, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}) const
	Generate a new dataset containing the specified variables with events sampled from our distribution.
virtual RooFit::OwningPtr< RooDataHist >	generateBinned (const RooArgSet &whatVars, double nEvents, bool expectedData=false, bool extended=false) const
	Generate a new dataset containing the specified variables with events sampled from our distribution.
virtual RooFit::OwningPtr< RooDataHist >	generateBinned (const RooArgSet &whatVars, double nEvents, const RooCmdArg &arg1, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}) const
	As RooAbsPdf::generateBinned(const RooArgSet&, const RooCmdArg&,const RooCmdArg&, const RooCmdArg&,const RooCmdArg&, const RooCmdArg&,const RooCmdArg&) const.
virtual void	generateEvent (Int_t code)
	Interface for generation of an event using the algorithm corresponding to the specified code.
virtual RooFit::OwningPtr< RooDataSet >	generateSimGlobal (const RooArgSet &whatVars, Int_t nEvents)
	Special generator interface for generation of 'global observables' – for RooStats tools.
RooArgSet *	getAllConstraints (const RooArgSet &observables, RooArgSet &constrainedParams, bool stripDisconnected=true, bool removeConstraintsFromPdf=false) const
	This helper function finds and collects all constraints terms of all component p.d.f.s and returns a RooArgSet with all those terms.
virtual RooArgSet *	getConstraints (const RooArgSet &, RooArgSet &, bool, bool=false) const
virtual Int_t	getGenerator (const RooArgSet &directVars, RooArgSet &generateVars, bool staticInitOK=true) const
	Load generatedVars with the subset of directVars that we can generate events for, and return a code that specifies the generator algorithm we will use.
const RooNumGenConfig *	getGeneratorConfig () const
	Return the numeric MC generator configuration used for this object.
void	getLogProbabilities (std::span< const double > pdfValues, double *output) const
virtual double	getLogVal (const RooArgSet *set=nullptr) const
	Return the log of the current value with given normalization An error message is printed if the argument of the log is negative.
double	getNorm (const RooArgSet &nset) const
	Get normalisation term needed to normalise the raw values returned by getVal().
virtual double	getNorm (const RooArgSet *set=nullptr) const
	Get normalisation term needed to normalise the raw values returned by getVal().
const RooAbsReal *	getNormIntegral (const RooArgSet &nset) const
virtual const RooAbsReal *	getNormObj (const RooArgSet *set, const RooArgSet *iset, const TNamed *rangeName=nullptr) const
	Return pointer to RooAbsReal object that implements calculation of integral over observables iset in range rangeName, optionally taking the integrand normalized over observables nset.
double	getValV (const RooArgSet *set=nullptr) const override
	Return current value, normalized by integrating over the observables in nset.
virtual void	initGenerator (Int_t code)
	Interface for one-time initialization to setup the generator for the specified code.
virtual bool	isDirectGenSafe (const RooAbsArg &arg) const
	Check if given observable can be safely generated using the pdfs internal generator mechanism (if that existsP).
bool	mustBeExtended () const
	If true PDF must provide extended likelihood term.
const char *	normRange () const
virtual RooPlot *	paramOn (RooPlot *frame, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={})
	Add a box with parameter values (and errors) to the specified frame.
RooPlot *	plotOn (RooPlot *frame, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={}, const RooCmdArg &arg9={}, const RooCmdArg &arg10={}) const override
	Helper calling plotOn(RooPlot*, RooLinkedList&) const.
RooPlot *	plotOn (RooPlot *frame, RooLinkedList &cmdList) const override
	Plot (project) PDF on specified frame.
GenSpec *	prepareMultiGen (const RooArgSet &whatVars, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={})
	Prepare GenSpec configuration object for efficient generation of multiple datasets from identical specification.
void	printMultiline (std::ostream &os, Int_t contents, bool verbose=false, TString indent="") const override
	Print multi line detailed information of this RooAbsPdf.
void	printValue (std::ostream &os) const override
	Print value of p.d.f, also print normalization integral that was last used, if any.
virtual void	resetErrorCounters (Int_t resetValue=10)
	Reset error counter to given value, limiting the number of future error messages for this pdf to 'resetValue'.
void	setGeneratorConfig ()
	Remove the specialized numeric MC generator configuration associated with this object.
void	setGeneratorConfig (const RooNumGenConfig &config)
	Set the given configuration as default numeric MC generator configuration for this object.
void	setNormRange (const char *rangeName)
void	setNormRangeOverride (const char *rangeName)
void	setTraceCounter (Int_t value, bool allNodes=false)
	Reset trace counter to given value, limiting the number of future trace messages for this pdf to 'value'.
RooNumGenConfig *	specialGeneratorConfig () const
	Returns the specialized integrator configuration for this RooAbsReal.
RooNumGenConfig *	specialGeneratorConfig (bool createOnTheFly)
	Returns the specialized integrator configuration for this RooAbsReal.
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.
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.
RooFit::OwningPtr< 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 RooFit::OwningPtr< RooFitResult >	chi2FitTo (RooDataHist &data, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={})
	Perform a \( \chi^2 \) fit to given histogram.
virtual RooFit::OwningPtr< RooFitResult >	chi2FitTo (RooDataHist &data, const RooLinkedList &cmdList)
	Calls RooAbsReal::createChi2(RooDataSet& data, const RooLinkedList& cmdList) and returns fit result.
virtual RooFit::OwningPtr< RooFitResult >	chi2FitTo (RooDataSet &xydata, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={})
	Perform a 2-D \( \chi^2 \) fit using a series of x and y values stored in the dataset xydata.
virtual RooFit::OwningPtr< 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 RooFit::OwningPtr< RooAbsReal >	createChi2 (RooDataHist &data, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={})
	Create a \( \chi^2 \) variable from a histogram and this function.
virtual RooFit::OwningPtr< RooAbsReal >	createChi2 (RooDataHist &data, const RooLinkedList &cmdList)
virtual RooFit::OwningPtr< RooAbsReal >	createChi2 (RooDataSet &data, const RooCmdArg &arg1={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={})
	Create a \( \chi^2 \) from a series of x and y values stored in a dataset.
virtual RooFit::OwningPtr< 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&)
RooFit::OwningPtr< 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={}, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={}) 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 listed in iset.
RooFit::OwningPtr< RooAbsReal >	createIntegral (const RooArgSet &iset, const RooCmdArg &arg1, const RooCmdArg &arg2={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={}) const
	Create an object that represents the integral of the function over one or more observables 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 RooFit::OwningPtr< 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={}, const RooCmdArg &arg3={}, const RooCmdArg &arg4={}, const RooCmdArg &arg5={}, const RooCmdArg &arg6={}, const RooCmdArg &arg7={}, const RooCmdArg &arg8={})
	Create an object that represents the running integral of the function over one or more observables 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 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.
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.
const char *	getPlotLabel () const
	Get the label associated with the variable.
double	getPropagatedError (const RooFitResult &fr, const RooArgSet &nset={}) const
	Propagates parameter uncertainties to an uncertainty estimate for this RooAbsReal.
TString	getTitle (bool appendUnit=false) const
	Return this variable's title 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.
virtual void	gradient (double *) const
virtual bool	hasGradient () const
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.
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 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	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.
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.
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.
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 conjunction 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 expression 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	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	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
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 address of this RooAbsArg.
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.
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.
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
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 void	constOptimizeTestStatistic (ConstOpCode opcode, bool doAlsoTrackingOpt=true)
	Interface function signaling a request to perform constant term optimization.
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
virtual const char *	cacheUniqueSuffix () 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	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	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 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 UInt_t	GetUniqueID () const
	Return the unique object id.
virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.
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)
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
R__ALWAYS_INLINE Bool_t	IsZombie () const
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 (the base implementation is no-op).
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, void *vp)
	Only called by placement new when throwing an exception.
void	operator delete[] (void *ptr)
	Operator delete [].
void	operator delete[] (void *ptr, void *vp)
	Only called by placement new[] when throwing an exception.
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 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.
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 StyleOption	defaultPrintStyle (Option_t *opt) const
virtual void	printExtras (std::ostream &os) const
	Interface to print extras 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'.
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 RooAbsCachedPdf
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
Static Public Member Functions inherited from RooAbsPdf
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
static RooNumGenConfig *	defaultGeneratorConfig ()
	Returns the default numeric MC generator configuration for all RooAbsReals.
static int	verboseEval ()
	Return global level of verbosity for p.d.f. evaluations.
static void	verboseEval (Int_t stat)
	Change global level of verbosity for p.d.f. evaluations.
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 logging 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
RooFit::OwningPtr< RooArgSet >	actualObservables (const RooArgSet &nset) const override
	Return the observables to be cached given the normalization set nset.
RooFit::OwningPtr< RooArgSet >	actualParameters (const RooArgSet &nset) const override
	Return the parameters on which the cache depends given normalization set nset.
void	calcParams ()
	(Re)calculate effective parameters of this p.d.f.
PdfCacheElem *	createCache (const RooArgSet *nset) const override
	Return specialized cache subclass for FFT calculations.
double	evaluate () const override
	Evaluate this PDF / function / constant. Needs to be overridden by all derived classes.
void	fillCacheObject (PdfCacheElem &cache) const override
	Fill the contents of the cache the FFT convolution output.
void	fillCacheSlice (FFTCacheElem &cache, const RooArgSet &slicePosition) const
	Fill a slice of cachePdf with the output of the FFT convolution calculation.
RooAbsGenContext *	genContext (const RooArgSet &vars, const RooDataSet *prototype=nullptr, const RooArgSet *auxProto=nullptr, bool verbose=false) const override
	Create appropriate generator context for this convolution.
TString	histNameSuffix () const override
	Suffix for cache histogram (added in addition to suffix for cache name)
const char *	inputBaseName () const override
	Return base name component for cache components in this case 'PDF1_CONV_PDF2'.
RooAbsArg &	pdfObservable (RooAbsArg &histObservable) const override
	Return p.d.f.
std::vector< double >	scanPdf (RooRealVar &obs, RooAbsPdf &pdf, const RooDataHist &hist, const RooArgSet &slicePos, Int_t &N, Int_t &N2, Int_t &zeroBin, double shift) const
	Scan the values of 'pdf' in observable 'obs' using the bin values stored in 'hist' at slice position 'slicePos' N is filled with the number of bins defined in hist, N2 is filled with N plus the number of buffer bins The return value is an array of doubles of length N2 with the sampled values.
Protected Member Functions inherited from RooAbsCachedPdf
virtual const char *	binningName () const
std::string	cacheNameSuffix (const RooArgSet &nset) const
	Construct string with unique suffix for cache objects based on observable names that define cache configuration.
void	computeBatch (double *output, size_t size, RooFit::Detail::DataMap const &) const override
	Base function for computing multiple values of a RooAbsReal.
void	disableCache (bool flag)
PdfCacheElem *	getCache (const RooArgSet *nset, bool recalculate=true) const
	Retrieve cache object associated with given choice of observables.
virtual const char *	payloadUniqueSuffix () const
Protected Member Functions inherited from RooAbsPdf
	RooAbsPdf (const RooAbsPdf &other, const char *name=nullptr)
	Copy constructor.
virtual std::unique_ptr< RooAbsReal >	createNLLImpl (RooAbsData &data, const RooLinkedList &cmdList)
	Protected implementation of the NLL creation routine.
virtual std::unique_ptr< RooFitResult >	fitToImpl (RooAbsData &data, const RooLinkedList &cmdList)
	Protected implementation of the likelihood fitting routine.
bool	isActiveNormSet (RooArgSet const *normSet) const
	Checks if normSet is the currently active normalization set of this PDF, meaning is exactly the same object as the one the _normSet member points to (or both are nullptr).
double	normalizeWithNaNPacking (double rawVal, double normVal) const
RooPlot *	plotOn (RooPlot *frame, PlotOpt o) const override
	Plot oneself on 'frame'.
Int_t *	randomizeProtoOrder (Int_t nProto, Int_t nGen, bool resample=false) const
	Return lookup table with randomized order for nProto prototype events.
bool	redirectServersHook (const RooAbsCollection &newServerList, bool mustReplaceAll, bool nameChange, bool isRecursiveStep) override
	The cache manager.
virtual bool	syncNormalization (const RooArgSet *dset, bool adjustProxies=true) const
	Verify that the normalization integral cached with this PDF is valid for given set of normalization observables.
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
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.
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 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().
bool	matchArgsByName (const RooArgSet &allArgs, RooArgSet &matchedArgs, const TList &nameList) const
	Check if allArgs contains matching elements for each name in nameList.
virtual RooPlot *	plotAsymOn (RooPlot *frame, const RooAbsCategoryLValue &asymCat, PlotOpt o) const
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
	Function that is called at the end of redirectServers().
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.
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	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 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.
void	setValueDirty (const RooAbsArg *source)
	Force element to re-evaluate itself when a value is requested.
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
double	_bufFrac
BufStrat	_bufStrat
RooSetProxy	_cacheObs
	Non-convolution observables that are also cached.
RooSetProxy	_params
	Effective parameters of this p.d.f.
RooRealProxy	_pdf1
	First input p.d.f.
RooRealProxy	_pdf2
	Second input p.d.f.
double	_shift1
double	_shift2
RooRealProxy	_x
	Convolution observable.
RooRealProxy	_xprime
	Input function representing value of convolution observable.
Protected Attributes inherited from RooAbsCachedPdf
std::map< Int_t, AnaIntConfig >	_anaIntMap
	! Map for analytical integration codes
RooAICRegistry	_anaReg
	! Registry for analytical integration codes
RooObjCacheManager	_cacheMgr
Int_t	_ipOrder
	The cache manager.
Protected Attributes inherited from RooAbsPdf
Int_t	_errorCount
	Number of errors remaining to print.
Int_t	_negCount
	Number of negative probabilities remaining to print.
RooAbsReal *	_norm = nullptr
RooObjCacheManager	_normMgr
TString	_normRange
	Normalization range.
RooArgSet const *	_normSet = nullptr
	Normalization integral (owned by _normMgr)
double	_rawValue
bool	_selectComp
	Component selection flag for RooAbsPdf::plotCompOn.
std::unique_ptr< RooNumGenConfig >	_specGeneratorConfig
	! MC generator configuration specific for this object
Int_t	_traceCount
	Number of traces remaining to print.
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
	Component selection flag for RooAbsPdf::plotCompOn.
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
	A buffer for reading values from trees.
std::unique_ptr< RooNumIntConfig >	_specIntegratorConfig
std::unique_ptr< TreeReadBuffer >	_treeReadBuffer
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 = false
RooExpensiveObjectCache *	_eocache {nullptr}
	Prohibit server redirects – Debugging tool.
bool	_fast = false
bool	_isConstant = false
	De-duplicated name pointer. This will be equal for all objects with the same name.
bool	_localNoInhibitDirty = false
	Cached isConstant status.
RooWorkspace *	_myws = nullptr
	Prevent 'AlwaysDirty' mode for this node.
const TNamed *	_namePtr = nullptr
	Pointer to global cache manager for any expensive components created by this object.
OperMode	_operMode = Auto
RooArgSet *	_ownedComponents = nullptr
bool	_prohibitServerRedirect = false
	Set of owned component.
RooRefArray	_proxyList
ProxyListCache	_proxyListCache
RefCountList_t	_serverList
bool	_shapeDirty = true
std::map< std::string, std::string >	_stringAttrib
bool	_valueDirty = true
Protected Attributes inherited from TNamed
TString	fName
TString	fTitle

Private Member Functions
void	prepareFFTBinning (RooRealVar &convVar) const
	Try to improve the binning and inform user if possible.

Friends
class	FFTCacheElem
class	RooConvGenContext

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.
Static Protected Attributes inherited from RooAbsPdf
static TString	_normRangeOverride
static Int_t	_verboseEval = 0
Static Protected Attributes inherited from RooAbsReal
static Int_t	_evalErrorCount = 0
static std::map< const RooAbsArg *, std::pair< std::string, std::list< EvalError > > >	_evalErrorList
static ErrorLoggingMode	_evalErrorMode = RooAbsReal::PrintErrors
static bool	_globalSelectComp = false
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

#include <RooFFTConvPdf.h>

Inheritance diagram for RooFFTConvPdf:

Member Enumeration Documentation

BufStrat

enum RooFFTConvPdf::BufStrat

Enumerator
Extend
Mirror
Flat

Definition at line 47 of file RooFFTConvPdf.h.

Constructor & Destructor Documentation

RooFFTConvPdf() [1/4]

RooFFTConvPdf::RooFFTConvPdf ( )

inline

Definition at line 28 of file RooFFTConvPdf.h.

RooFFTConvPdf() [2/4]

RooFFTConvPdf::RooFFTConvPdf	(	const char *	name,
		const char *	title,
		RooRealVar &	convVar,
		RooAbsPdf &	pdf1,
		RooAbsPdf &	pdf2,
		Int_t	ipOrder = 2
	)

Constructor for numerical (FFT) convolution of PDFs.

Parameters

[in]	name	Name of this PDF
[in]	title	Title for plotting this PDF
[in]	convVar	Observable to convolve the PDFs in

Attention

Use a high number of bins (>= 1000) for good accuracy.

Parameters

[in]	pdf1	First PDF to be convolved
[in]	pdf2	Second PDF to be convolved
[in]	ipOrder	Order for interpolation between bins (since FFT is discrete) The binning used for the FFT sampling is controlled by the binning named "cache" in the convolution observable convVar. If such a binning is not set, the same number of bins as for convVar will be used.

Definition at line 223 of file RooFFTConvPdf.cxx.

RooFFTConvPdf() [3/4]

RooFFTConvPdf::RooFFTConvPdf	(	const char *	name,
		const char *	title,
		RooAbsReal &	pdfConvVar,
		RooRealVar &	convVar,
		RooAbsPdf &	pdf1,
		RooAbsPdf &	pdf2,
		Int_t	ipOrder = 2
	)

Constructor for numerical (FFT) convolution of PDFs.

Parameters

[in]	name	Name of this PDF
[in]	title	Title for plotting this PDF
[in]	convVar	Observable to convolve the PDFs in

Attention

Use a high number of bins (>= 1000) for good accuracy.

Parameters

[in]	pdf1	First PDF to be convolved
[in]	pdf2	Second PDF to be convolved
[in]	ipOrder	Order for interpolation between bins (since FFT is discrete) The binning used for the FFT sampling is controlled by the binning named "cache" in the convolution observable convVar. If such a binning is not set, the same number of bins as for convVar will be used.
[in]	pdfConvVar	If the variable used for convolution is a PDF, itself, pass the PDF here, and pass the convolution variable to convVar. See also rf210_angularconv.C in the roofit tutorials

Definition at line 249 of file RooFFTConvPdf.cxx.

RooFFTConvPdf() [4/4]

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

Copy constructor.

Definition at line 274 of file RooFFTConvPdf.cxx.

~RooFFTConvPdf()

RooFFTConvPdf::~RooFFTConvPdf ( )

override

Destructor.

Definition at line 294 of file RooFFTConvPdf.cxx.

Member Function Documentation

actualObservables()

RooFit::OwningPtr< RooArgSet > RooFFTConvPdf::actualObservables ( const RooArgSet &  nset ) const

overrideprotectedvirtual

Return the observables to be cached given the normalization set nset.

If the cache observable is in nset then this is

• the convolution observable plus
• any member of nset that is either a RooCategory,
• or was previously specified through setCacheObservables().

In case the cache observable is not in nset, then it is

• the convolution observable plus
• all member of nset that are observables of this p.d.f.

Implements RooAbsCachedPdf.

Definition at line 774 of file RooFFTConvPdf.cxx.

actualParameters()

RooFit::OwningPtr< RooArgSet > RooFFTConvPdf::actualParameters ( const RooArgSet &  nset ) const

overrideprotectedvirtual

Return the parameters on which the cache depends given normalization set nset.

For this p.d.f these are the parameters of the input p.d.f. but never the convolution variable, in case it is not part of nset.

Implements RooAbsCachedPdf.

Definition at line 829 of file RooFFTConvPdf.cxx.

bufferFraction()

double RooFFTConvPdf::bufferFraction ( ) const

inline

Return value of buffer fraction applied in FFT calculation array beyond either end of the observable domain to reduce cyclical effects.

Definition at line 43 of file RooFFTConvPdf.h.

bufferStrategy()

BufStrat RooFFTConvPdf::bufferStrategy ( ) const

inline

Return the strategy currently used to fill the buffer: 'Extend' means is that the input p.d.f convolution observable range is widened to include the buffer range 'Flat' means that the buffer is filled with the p.d.f.

value at the boundary of the observable range 'Mirror' means that the buffer is filled with a mirror image of the p.d.f. around the convolution observable boundary

Definition at line 52 of file RooFFTConvPdf.h.

cacheObservables()

const RooArgSet & RooFFTConvPdf::cacheObservables ( ) const

inline

Definition at line 39 of file RooFFTConvPdf.h.

calcParams()

void RooFFTConvPdf::calcParams ( )

protected

(Re)calculate effective parameters of this p.d.f.

Definition at line 953 of file RooFFTConvPdf.cxx.

Class()

static TClass * RooFFTConvPdf::Class ( )

static

Returns

TClass describing this class

Class_Name()

static const char * RooFFTConvPdf::Class_Name ( )

static

Returns

Name of this class

Class_Version()

static constexpr Version_t RooFFTConvPdf::Class_Version ( )

inlinestaticconstexpr

Returns

Version of this class

Definition at line 124 of file RooFFTConvPdf.h.

clone()

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

inlineoverridevirtual

Implements RooAbsArg.

Definition at line 34 of file RooFFTConvPdf.h.

createCache()

RooFFTConvPdf::PdfCacheElem * RooFFTConvPdf::createCache ( const RooArgSet *  nset ) const

overrideprotectedvirtual

Return specialized cache subclass for FFT calculations.

Reimplemented from RooAbsCachedPdf.

Definition at line 344 of file RooFFTConvPdf.cxx.

DeclFileName()

static const char * RooFFTConvPdf::DeclFileName ( )

inlinestatic

Returns

Name of the file containing the class declaration

Definition at line 124 of file RooFFTConvPdf.h.

evaluate()

double RooFFTConvPdf::evaluate ( ) const

inlineoverrideprotectedvirtual

Evaluate this PDF / function / constant. Needs to be overridden by all derived classes.

Implements RooAbsReal.

Definition at line 96 of file RooFFTConvPdf.h.

fillCacheObject()

void RooFFTConvPdf::fillCacheObject ( RooAbsCachedPdf::PdfCacheElem &  cache ) const

overrideprotectedvirtual

Fill the contents of the cache the FFT convolution output.

Implements RooAbsCachedPdf.

Definition at line 481 of file RooFFTConvPdf.cxx.

fillCacheSlice()

void RooFFTConvPdf::fillCacheSlice ( FFTCacheElem &  cache, const RooArgSet &  slicePosition  ) const

protected

Fill a slice of cachePdf with the output of the FFT convolution calculation.

Definition at line 561 of file RooFFTConvPdf.cxx.

genContext()

RooAbsGenContext * RooFFTConvPdf::genContext ( const RooArgSet &  vars, const RooDataSet *  prototype = nullptr, const RooArgSet *  auxProto = nullptr, bool  verbose = false  ) const

overrideprotectedvirtual

Create appropriate generator context for this convolution.

If both input p.d.f.s support internal generation, if it is safe to use them and if no observables other than the convolution observable are requested for generation, use the specialized convolution generator context which implements a smearing strategy in the convolution observable. If not return the regular accept/reject generator context

Reimplemented from RooAbsPdf.

Definition at line 860 of file RooFFTConvPdf.cxx.

getMaxVal()

Int_t RooFFTConvPdf::getMaxVal ( const RooArgSet &  vars ) const

inlineoverridevirtual

Advertise capability to determine maximum value of function for given set of observables.

If no direct generator method is provided, this information will assist the accept/reject generator to operate more efficiently as it can skip the initial trial sampling phase to empirically find the function maximum

Reimplemented from RooAbsReal.

Definition at line 61 of file RooFFTConvPdf.h.

histNameSuffix()

TString RooFFTConvPdf::histNameSuffix ( ) const

overrideprotectedvirtual

Suffix for cache histogram (added in addition to suffix for cache name)

Reimplemented from RooAbsCachedPdf.

Definition at line 450 of file RooFFTConvPdf.cxx.

inputBaseName()

const char * RooFFTConvPdf::inputBaseName ( ) const

overrideprotectedvirtual

Return base name component for cache components in this case 'PDF1_CONV_PDF2'.

Implements RooAbsCachedPdf.

Definition at line 329 of file RooFFTConvPdf.cxx.

IsA()

TClass * RooFFTConvPdf::IsA ( ) const

inlineoverridevirtual

Returns

TClass describing current object

Reimplemented from RooAbsCachedPdf.

Definition at line 124 of file RooFFTConvPdf.h.

maxVal()

double RooFFTConvPdf::maxVal ( Int_t  code ) const

inlineoverridevirtual

Return maximum value for set of observables identified by code assigned in getMaxVal.

Reimplemented from RooAbsReal.

Definition at line 62 of file RooFFTConvPdf.h.

pdfObservable()

RooAbsArg & RooFFTConvPdf::pdfObservable ( RooAbsArg &  histObservable ) const

overrideprotectedvirtual

Return p.d.f.

observable (which can be a function) to substitute given p.d.f. observable. Substitutes x by xprime if xprime is set.

Reimplemented from RooAbsCachedPdf.

Definition at line 843 of file RooFFTConvPdf.cxx.

prepareFFTBinning()

void RooFFTConvPdf::prepareFFTBinning ( RooRealVar &  convVar ) const

private

Try to improve the binning and inform user if possible.

With a 10% buffer fraction, 930 raw bins yield 1024 FFT bins, a sweet spot for the speed of FFTW.

Definition at line 304 of file RooFFTConvPdf.cxx.

printMetaArgs()

void RooFFTConvPdf::printMetaArgs ( std::ostream &  os ) const

overridevirtual

Customized printing of arguments of a RooNumConvPdf to more intuitively reflect the contents of the product operator construction.

Reimplemented from RooAbsArg.

Definition at line 943 of file RooFFTConvPdf.cxx.

scanPdf()

std::vector< double > RooFFTConvPdf::scanPdf ( RooRealVar &  obs, RooAbsPdf &  pdf, const RooDataHist &  hist, const RooArgSet &  slicePos, Int_t &  N, Int_t &  N2, Int_t &  zeroBin, double  shift  ) const

protected

Scan the values of 'pdf' in observable 'obs' using the bin values stored in 'hist' at slice position 'slicePos' N is filled with the number of bins defined in hist, N2 is filled with N plus the number of buffer bins The return value is an array of doubles of length N2 with the sampled values.

The caller takes ownership of the array

Definition at line 661 of file RooFFTConvPdf.cxx.

setBufferFraction()

void RooFFTConvPdf::setBufferFraction

(

double

frac

)

Change the size of the buffer on either side of the observable range to frac times the size of the range of the convolution observable.

Definition at line 908 of file RooFFTConvPdf.cxx.

setBufferStrategy()

void RooFFTConvPdf::setBufferStrategy

(

BufStrat

bs

)

Change strategy to fill the overflow buffer on either side of the convolution observable range.

• Extend means is that the input p.d.f convolution observable range is widened to include the buffer range
• Flat means that the buffer is filled with the p.d.f. value at the boundary of the observable range
• Mirror means that the buffer is filled with a mirror image of the p.d.f. around the convolution observable boundary

The default strategy is extend. If one of the input p.d.f.s is a RooAddPdf, it is configured so that the interpretation range of the fraction coefficients is kept at the nominal convolutions observable range (instead of interpreting coefficients in the widened range including the buffer).

Definition at line 932 of file RooFFTConvPdf.cxx.

setCacheObservables()

void RooFFTConvPdf::setCacheObservables ( const RooArgSet &  obs )

inline

Definition at line 38 of file RooFFTConvPdf.h.

setShift()

void RooFFTConvPdf::setShift ( double  val1, double  val2  )

inline

Definition at line 37 of file RooFFTConvPdf.h.

Streamer()

void RooFFTConvPdf::Streamer ( TBuffer &  R__b )

overridevirtual

Stream an object of class TObject.

Reimplemented from RooAbsCachedPdf.

StreamerNVirtual()

void RooFFTConvPdf::StreamerNVirtual ( TBuffer &  ClassDef_StreamerNVirtual_b )

inline

Definition at line 124 of file RooFFTConvPdf.h.

Friends And Related Symbol Documentation

FFTCacheElem

friend class FFTCacheElem

friend

Definition at line 94 of file RooFFTConvPdf.h.

RooConvGenContext

friend class RooConvGenContext

friend

Definition at line 117 of file RooFFTConvPdf.h.

Member Data Documentation

_bufFrac

double RooFFTConvPdf::_bufFrac

protected

Definition at line 108 of file RooFFTConvPdf.h.

_bufStrat

BufStrat RooFFTConvPdf::_bufStrat

protected

Definition at line 109 of file RooFFTConvPdf.h.

_cacheObs

RooSetProxy RooFFTConvPdf::_cacheObs

protected

Non-convolution observables that are also cached.

Definition at line 118 of file RooFFTConvPdf.h.

_params

RooSetProxy RooFFTConvPdf::_params

protected

Effective parameters of this p.d.f.

Definition at line 71 of file RooFFTConvPdf.h.

_pdf1

RooRealProxy RooFFTConvPdf::_pdf1

protected

First input p.d.f.

Definition at line 69 of file RooFFTConvPdf.h.

_pdf2

RooRealProxy RooFFTConvPdf::_pdf2

protected

Second input p.d.f.

Definition at line 70 of file RooFFTConvPdf.h.

_shift1

double RooFFTConvPdf::_shift1

protected

Definition at line 111 of file RooFFTConvPdf.h.

_shift2

double RooFFTConvPdf::_shift2

protected

Definition at line 112 of file RooFFTConvPdf.h.

_x

RooRealProxy RooFFTConvPdf::_x

protected

Convolution observable.

Definition at line 67 of file RooFFTConvPdf.h.

_xprime

RooRealProxy RooFFTConvPdf::_xprime

protected

Input function representing value of convolution observable.

Definition at line 68 of file RooFFTConvPdf.h.

Libraries for RooFFTConvPdf:

---

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

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