RooTreeDataStore is a TTree-backed data storage.

When a file is opened before creating the data storage, the storage will be file-backed. This reduces memory pressure because it allows storing the data in the file and reading it on demand. For a completely memory-backed storage, which is faster than the file-backed storage, RooVectorDataStore can be used.

With tree-backed storage, the tree can be found in the file with the name RooTreeDataStore_name_title for a dataset created as RooDataSet("name", "title", ...).

Note: A file needs to be opened before creating the data storage to enable file-backed storage.
TFile outputFile("filename.root", "RECREATE");

RooAbsData::setDefaultStorageType(RooAbsData::Tree);

RooDataSet mydata(...);

RooAbsData::setDefaultStorageType
static void setDefaultStorageType(StorageType s)
Definition: RooAbsData.cxx:77

RooAbsData::Tree
@ Tree
Definition: RooAbsData.h:230

RooDataSet
RooDataSet is a container class to hold unbinned data.
Definition: RooDataSet.h:33

TFile
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format.
Definition: TFile.h:53

One can also change between TTree- and std::vector-backed storage using RooAbsData::convertToTreeStore() and RooAbsData::convertToVectorStore().

Definition at line 29 of file RooTreeDataStore.h.

Public Member Functions
	RooTreeDataStore ()

	RooTreeDataStore (const char name, const char title, const RooArgSet &vars, const char *wgtVarName=0)

	RooTreeDataStore (const char name, const char title, const RooArgSet &vars, const RooAbsDataStore &tds, const char selExpr=0, const char wgtVarName=0)

	RooTreeDataStore (const char name, const char title, const RooArgSet &vars, const RooAbsDataStore &tds, const RooFormulaVar &select, const char *wgtVarName=0)

	RooTreeDataStore (const char name, const char title, const RooArgSet &vars, TTree &t, const char selExpr=0, const char wgtVarName=0)

	RooTreeDataStore (const char name, const char title, const RooArgSet &vars, TTree &t, const RooFormulaVar &select, const char *wgtVarName=0)

	RooTreeDataStore (const char name, const char title, RooAbsDataStore &tds, const RooArgSet &vars, const RooFormulaVar cutVar, const char cutRange, Int_t nStart, Int_t nStop, Bool_t, const char *wgtVarName=0)

	RooTreeDataStore (const RooTreeDataStore &other, const char *newname=0)

	RooTreeDataStore (const RooTreeDataStore &other, const RooArgSet &vars, const char *newname=0)

	RooTreeDataStore (TTree t, const RooArgSet &vars, const char wgtVarName=0)
	Constructor to facilitate reading of legacy RooDataSets. More...

virtual	~RooTreeDataStore ()
	Destructor. More...

virtual RooAbsArg *	addColumn (RooAbsArg &var, Bool_t adjustRange=kTRUE)
	Add a new column to the data set which holds the pre-calculated values of 'newVar'. More...

virtual RooArgSet *	addColumns (const RooArgList &varList)
	Utility function to add multiple columns in one call See addColumn() for details. More...

virtual void	append (RooAbsDataStore &other)

virtual void	attachBuffers (const RooArgSet &extObs)

virtual void	cacheArgs (const RooAbsArg owner, RooArgSet &varSet, const RooArgSet nset=0, Bool_t skipZeroWeights=kFALSE)
	Cache given RooAbsArgs with this tree: The tree is given direct write access of the args internal cache the args values is pre-calculated for all data points in this data collection. More...

virtual const RooAbsArg *	cacheOwner ()

virtual Bool_t	changeObservableName (const char from, const char to)
	Change name of internal observable named 'from' into 'to'. More...

virtual void	checkInit () const

virtual RooAbsDataStore *	clone (const char *newname=0) const

virtual RooAbsDataStore *	clone (const RooArgSet &vars, const char *newname=0) const

void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

virtual Int_t	fill ()
	Interface function to TTree::Fill. More...

Int_t	Fill ()
	Interface function to TTree::Fill. More...

virtual const RooArgSet *	get () const

virtual const RooArgSet *	get (Int_t index) const
	Load the n-th data point (n='index') in memory and return a pointer to the internal RooArgSet holding its coordinates. More...

virtual const RooArgSet *	get (Int_t index) const=0

virtual std::vector< RooSpan< const double > >	getBatch (std::size_t first, std::size_t last) const

Stat_t	GetEntries () const
	Interface function to TTree::GetEntries. More...

Int_t	GetEntry (Int_t entry=0, Int_t getall=0)
	Interface function to TTree::GetEntry. More...

virtual Bool_t	isWeighted () const

void	loadValues (const RooAbsDataStore tds, const RooFormulaVar select=0, const char *rangeName=0, std::size_t nStart=0, std::size_t nStop=std::numeric_limits< std::size_t >::max())
	Load values from dataset 't' into this data collection, optionally selecting events using 'select' RooFormulaVar. More...

void	loadValues (const TTree t, const RooFormulaVar select=0, const char *rangeName=0, Int_t nStart=0, Int_t nStop=2000000000)
	Load values from tree 't' into this data collection, optionally selecting events using the RooFormulaVar 'select'. More...

RooAbsDataStore *	merge (const RooArgSet &allvars, std::list< RooAbsDataStore * > dstoreList)
	Merge columns of supplied data set(s) with this data set. More...

virtual Int_t	numEntries () const

virtual void	reset ()

void	Reset (Option_t *option=0)
	Interface function to TTree::Reset. More...

virtual void	resetBuffers ()

virtual void	resetCache ()
	Remove tree with values of cached observables and clear list of cached observables. More...

void	restoreAlternateBuffers ()

const RooArgSet &	row ()

virtual void	setArgStatus (const RooArgSet &set, Bool_t active)
	Activate or deactivate the branch status of the TTree branch associated with the given set of dataset observables. More...

void	setExternalWeightArray (const Double_t arrayWgt, const Double_t arrayWgtErrLo, const Double_t arrayWgtErrHi, const Double_t arraySumW2)

virtual Double_t	sumEntries () const

TTree &	tree ()

virtual const TTree *	tree () const

virtual Bool_t	valid () const
	Return true if currently loaded coordinate is considered valid within the current range definitions of all observables. More...

virtual Double_t	weight () const
	Return the weight of the n-th data point (n='index') in memory. More...

virtual Double_t	weight (Int_t index) const
	Return the weight of the n-th data point (n='index') in memory. More...

virtual void	weightError (Double_t &lo, Double_t &hi, RooAbsData::ErrorType etype=RooAbsData::Poisson) const

virtual Double_t	weightError (RooAbsData::ErrorType etype=RooAbsData::Poisson) const

Public Member Functions inherited from RooAbsDataStore
	RooAbsDataStore ()
	Default constructor. More...

	RooAbsDataStore (const char name, const char title, const RooArgSet &vars)
	Default constructor. More...

	RooAbsDataStore (const RooAbsDataStore &other, const char *newname=0)

	RooAbsDataStore (const RooAbsDataStore &other, const RooArgSet &vars, const char *newname=0)

virtual	~RooAbsDataStore ()
	Destructor. More...

virtual RooAbsArg *	addColumn (RooAbsArg &var, Bool_t adjustRange=kTRUE)=0

virtual RooArgSet *	addColumns (const RooArgList &varList)=0

virtual void	append (RooAbsDataStore &other)=0

virtual void	attachBuffers (const RooArgSet &extObs)=0

virtual void	attachCache (const RooAbsArg *newOwner, const RooArgSet &cachedVars)=0

virtual void	cacheArgs (const RooAbsArg cacheOwner, RooArgSet &varSet, const RooArgSet nset=0, Bool_t skipZeroWeights=kFALSE)=0

const RooArgSet &	cachedVars () const

virtual const RooAbsArg *	cacheOwner ()=0

virtual Bool_t	changeObservableName (const char from, const char to)=0

virtual void	checkInit () const

virtual RooAbsDataStore *	clone (const char *newname=0) const =0

virtual RooAbsDataStore *	clone (const RooArgSet &vars, const char *newname=0) const =0

virtual Int_t	defaultPrintContents (Option_t *opt) const
	Define default print options, for a given print style. More...

Bool_t	dirtyProp () const

virtual void	dump ()

virtual Int_t	fill ()=0

virtual void	forceCacheUpdate ()

virtual const RooArgSet *	get () const

virtual const RooArgSet *	get (Int_t index) const =0

virtual std::vector< RooSpan< const double > >	getBatch (std::size_t first, std::size_t len) const =0

virtual RooSpan< const double >	getWeightBatch (std::size_t first, std::size_t len) const
	Get the weights of the events in the range [first, first+size). More...

virtual Bool_t	hasFilledCache () const

virtual Bool_t	isWeighted () const =0

virtual void	loadValues (const RooAbsDataStore tds, const RooFormulaVar select=0, const char *rangeName=0, std::size_t nStart=0, std::size_t nStop=std::numeric_limits< std::size_t >::max())=0

virtual RooAbsDataStore *	merge (const RooArgSet &allvars, std::list< RooAbsDataStore * > dstoreList)=0

virtual Int_t	numEntries () const =0

virtual void	Print (Option_t *options=0) const
	Print TNamed name and title. More...

virtual void	printArgs (std::ostream &os) const
	Print argument of dataset, i.e. the observable names. More...

virtual void	printClassName (std::ostream &os) const
	Print class name of dataset. More...

void	printMultiline (std::ostream &os, Int_t content, Bool_t verbose, TString indent) const
	Detailed printing interface. More...

virtual void	printName (std::ostream &os) const
	Print name of dataset. More...

virtual void	printTitle (std::ostream &os) const
	Print title of dataset. More...

virtual void	printValue (std::ostream &os) const
	Print value of the dataset, i.e. the sum of weights contained in the dataset. More...

virtual void	recalculateCache (const RooArgSet *, Int_t, Int_t, Int_t, Bool_t)

virtual void	reset ()=0

virtual void	resetBuffers ()=0

virtual void	resetCache ()=0

virtual void	setArgStatus (const RooArgSet &set, Bool_t active)=0

virtual void	setDirtyProp (Bool_t flag)

virtual void	setExternalWeightArray (const Double_t , const Double_t , const Double_t , const Double_t )

virtual Double_t	sumEntries () const

virtual const TTree *	tree () const

virtual Bool_t	valid () const =0
	Return true if currently loaded coordinate is considered valid within the current range definitions of all observables. More...

virtual Double_t	weight () const =0

virtual Double_t	weight (Int_t index) const =0

virtual void	weightError (Double_t &lo, Double_t &hi, RooAbsData::ErrorType etype=RooAbsData::Poisson) const =0

virtual Double_t	weightError (RooAbsData::ErrorType etype=RooAbsData::Poisson) const =0

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

	TNamed (const TNamed &named)
	TNamed copy ctor. More...

	TNamed (const TString &name, const TString &title)

virtual	~TNamed ()
	TNamed destructor. More...

virtual void	Clear (Option_t *option="")
	Set name and title to empty strings (""). More...

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects. More...

virtual void	Copy (TObject &named) const
	Copy this to obj. More...

virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer. More...

virtual const char *	GetName () const
	Returns name of object. More...

virtual const char *	GetTitle () const
	Returns title of object. More...

virtual ULong_t	Hash () const
	Return hash value for this object. More...

virtual Bool_t	IsSortable () const

virtual void	ls (Option_t *option="") const
	List TNamed name and title. More...

TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator. More...

virtual void	Print (Option_t *option="") const
	Print TNamed name and title. More...

virtual void	SetName (const char *name)
	Set the name of the TNamed. More...

virtual void	SetNameTitle (const char name, const char title)
	Set all the TNamed parameters (name and title). More...

virtual void	SetTitle (const char *title="")
	Set the title of the TNamed. More...

virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject. More...

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor. More...

	TObject (const TObject &object)
	TObject copy ctor. More...

virtual	~TObject ()
	TObject destructor. More...

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...

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. More...

virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...

virtual void	Clear (Option_t *="")

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method. More...

virtual void	Copy (TObject &object) const
	Copy this to obj. More...

virtual void	Delete (Option_t *option="")
	Delete this object. More...

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object. More...

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad for instance with: `gROOT->SetSelectedPad(gPad)`. More...

virtual void	Dump () const
	Dump contents of object on stdout. More...

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message. More...

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py). More...

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message. More...

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...

virtual const char *	GetIconName () const
	Returns mime type name of object. More...

virtual const char *	GetName () const
	Returns name of object. More...

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...

virtual Option_t *	GetOption () const

virtual const char *	GetTitle () const
	Returns title of object. More...

virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...

virtual ULong_t	Hash () const
	Return hash value for this object. More...

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. More...

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message. More...

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...

void	InvertBit (UInt_t f)

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...

R__ALWAYS_INLINE Bool_t	IsOnHeap () const

virtual Bool_t	IsSortable () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout. More...

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). More...

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...

void	operator delete (void *ptr)
	Operator delete. More...

void	operator delete[] (void *ptr)
	Operator delete []. More...

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. More...

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself. More...

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...

virtual void	Print (Option_t *option="") const
	This method must be overridden when a class wants to print itself. More...

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list. More...

void	ResetBit (UInt_t f)

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename. More...

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out". More...

void	SetBit (UInt_t f)

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message. More...

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. More...

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...

Public Member Functions inherited from RooPrintable
	RooPrintable ()

virtual	~RooPrintable ()

virtual Int_t	defaultPrintContents (Option_t *opt) const
	Default choice of contents to be printed (name and value) More...

virtual StyleOption	defaultPrintStyle (Option_t *opt) const

virtual void	printAddress (std::ostream &os) const
	Print class name of object. More...

virtual void	printArgs (std::ostream &os) const
	Interface for printing of object arguments. More...

virtual void	printClassName (std::ostream &os) const
	Print class name of object. More...

virtual void	printExtras (std::ostream &os) const
	Interface to print extras of object. More...

virtual void	printMultiline (std::ostream &os, Int_t contents, Bool_t verbose=kFALSE, TString indent="") const
	Interface for detailed printing of object. More...

virtual void	printName (std::ostream &os) const
	Print name of object. More...

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'. More...

virtual void	printTitle (std::ostream &os) const
	Print title of object. More...

virtual void	printTree (std::ostream &os, TString indent="") const
	Interface for tree structure printing of object. More...

virtual void	printValue (std::ostream &os) const
	Interface to print value of object. More...

Private Member Functions
void	attachCache (const RooAbsArg *newOwner, const RooArgSet &cachedVars)
	Initialize cache of dataset: attach variables of cache ArgSet to the corresponding TTree branches. More...

void	createTree (const char name, const char title)
	Create TTree object that lives in memory, independent of current location of gDirectory. More...

Int_t	getBranchBufferSize () const

void	initialize ()
	One-time initialization common to all constructor forms. More...

std::string	makeTreeName () const
	Generate a name for the storage tree from the name and title of this instance. More...

void	setBranchBufferSize (Int_t size)

RooArgSet	varsNoWeight (const RooArgSet &allVars, const char *wgtName=0)
	Utility function for constructors Return RooArgSet that is copy of allVars minus variable matching wgtName if specified. More...

RooRealVar *	weightVar (const RooArgSet &allVars, const char *wgtName=0)
	Utility function for constructors Return pointer to weight variable if it is defined. More...

Private Attributes
RooArgSet	_attachedBuffers

const RooAbsArg *	_cacheOwner
	TTree holding the cached function values. More...

TTree *	_cacheTree

Double_t	_curWgt
	External sum of weights array. More...

Double_t	_curWgtErr

Double_t	_curWgtErrHi

Double_t	_curWgtErrLo

Bool_t	_defCtor
	Object owning cache contents. More...

const Double_t *	_extSumW2Array {nullptr}
	External weight array - high error. More...

const Double_t *	_extWgtArray {nullptr}

const Double_t *	_extWgtErrHiArray {nullptr}
	External weight array - low error. More...

const Double_t *	_extWgtErrLoArray {nullptr}
	External weight array. More...

TTree *	_tree

RooArgSet	_varsww
	Was object constructed with default ctor? More...

RooRealVar *	_wgtVar

Static Private Attributes
static Int_t	_defTreeBufSize = 1010241024

Friends
class	RooVectorDataStore

Additional Inherited Members
Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) }

enum	EDeprecatedStatusBits { kObjInCanvas = BIT(3) }

enum	EStatusBits { kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) , kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(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 }

Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...

static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

Static Public Member Functions inherited from RooPrintable
static std::ostream &	defaultPrintStream (std::ostream *os=0)
	Return a reference to the current default stream to use in Print(). More...

static void	nameFieldLength (Int_t newLen)
	Set length of field reserved from printing name of RooAbsArgs in multi-line collection printing to given amount. More...

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(3) }

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). More...

void	MakeZombie ()

Protected Attributes inherited from RooAbsDataStore
RooArgSet	_cachedVars

Bool_t	_doDirtyProp

RooArgSet	_vars

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Static Protected Attributes inherited from RooPrintable
static Int_t	_nameLength

#include <RooTreeDataStore.h>

Inheritance diagram for RooTreeDataStore:

[legend]

Constructor & Destructor Documentation

◆ RooTreeDataStore() [1/10]

RooTreeDataStore::RooTreeDataStore ( )

Definition at line 74 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [2/10]

RooTreeDataStore::RooTreeDataStore	(	TTree *	t,
		const RooArgSet &	vars,
		const char *	wgtVarName = `0`
	)

Constructor to facilitate reading of legacy RooDataSets.

Definition at line 92 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [3/10]

RooTreeDataStore::RooTreeDataStore	(	const char *	name,
		const char *	title,
		const RooArgSet &	vars,
		const char *	wgtVarName = `0`
	)

Definition at line 109 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [4/10]

RooTreeDataStore::RooTreeDataStore	(	const char *	name,
		const char *	title,
		const RooArgSet &	vars,
		TTree &	t,
		const RooFormulaVar &	select,
		const char *	wgtVarName = `0`
	)

Definition at line 130 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [5/10]

RooTreeDataStore::RooTreeDataStore	(	const char *	name,
		const char *	title,
		const RooArgSet &	vars,
		TTree &	t,
		const char *	selExpr = `0`,
		const char *	wgtVarName = `0`
	)

Definition at line 151 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [6/10]

RooTreeDataStore::RooTreeDataStore	(	const char *	name,
		const char *	title,
		const RooArgSet &	vars,
		const RooAbsDataStore &	tds,
		const RooFormulaVar &	select,
		const char *	wgtVarName = `0`
	)

Definition at line 179 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [7/10]

RooTreeDataStore::RooTreeDataStore	(	const char *	name,
		const char *	title,
		const RooArgSet &	vars,
		const RooAbsDataStore &	tds,
		const char *	selExpr = `0`,
		const char *	wgtVarName = `0`
	)

Definition at line 200 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [8/10]

RooTreeDataStore::RooTreeDataStore	(	const char *	name,
		const char *	title,
		RooAbsDataStore &	tds,
		const RooArgSet &	vars,
		const RooFormulaVar *	cutVar,
		const char *	cutRange,
		Int_t	nStart,
		Int_t	nStop,
		Bool_t	,
		const char *	wgtVarName = `0`
	)

Definition at line 229 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [9/10]

RooTreeDataStore::RooTreeDataStore	(	const RooTreeDataStore &	other,
		const char *	newname = `0`
	)

Definition at line 330 of file RooTreeDataStore.cxx.

◆ RooTreeDataStore() [10/10]

RooTreeDataStore::RooTreeDataStore	(	const RooTreeDataStore &	other,
		const RooArgSet &	vars,
		const char *	newname = `0`
	)

Definition at line 353 of file RooTreeDataStore.cxx.

◆ ~RooTreeDataStore()

RooTreeDataStore::~RooTreeDataStore ( )

virtual

Destructor.

Definition at line 379 of file RooTreeDataStore.cxx.

Member Function Documentation

◆ addColumn()

RooAbsArg * RooTreeDataStore::addColumn	(	RooAbsArg &	newVar,
		Bool_t	adjustRange = `kTRUE`
	)

virtual

Add a new column to the data set which holds the pre-calculated values of 'newVar'.

This operation is only meaningful if 'newVar' is a derived value.

The return value points to the added element holding 'newVar's value in the data collection. The element is always the corresponding fundamental type of 'newVar' (e.g. a RooRealVar if 'newVar' is a RooFormulaVar)

Note: This function is explicitly NOT intended as a speed optimization opportunity for the user. Components of complex PDFs that can be precalculated with the dataset are automatically identified as such and will be precalculated when fitting to a dataset

By forcibly precalculating functions with non-trivial Jacobians, or functions of multiple variables occurring in the data set, using addColumn(), you may alter the outcome of the fit.

Only in cases where such a modification of fit behaviour is intentional, this function should be used.

Int_t RooTreeDataStore::GetEntry	(	Int_t	entry = `0`,
		Int_t	getall = `0`
	)

void RooTreeDataStore::loadValues	(	const TTree *	t,
		const RooFormulaVar *	select = `0`,
		const char *	rangeName = `0`,
		Int_t	nStart = `0`,
		Int_t	nStop = `2000000000`
	)

Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Friends

Additional Inherited Members

Constructor & Destructor Documentation

◆ RooTreeDataStore() [1/10]

◆ RooTreeDataStore() [2/10]

◆ RooTreeDataStore() [3/10]

◆ RooTreeDataStore() [4/10]

◆ RooTreeDataStore() [5/10]

◆ RooTreeDataStore() [6/10]

◆ RooTreeDataStore() [7/10]

◆ RooTreeDataStore() [8/10]

◆ RooTreeDataStore() [9/10]

◆ RooTreeDataStore() [10/10]

◆ ~RooTreeDataStore()

Member Function Documentation

◆ addColumn()

◆ addColumns()

◆ append()

◆ attachBuffers()

◆ attachCache()

◆ cacheArgs()

◆ cacheOwner()

◆ changeObservableName()

◆ checkInit()

◆ clone() [1/2]

◆ clone() [2/2]

◆ createTree()

◆ Draw()

◆ fill()

◆ Fill()

◆ get() [1/3]

◆ get() [2/3]

◆ get() [3/3]

◆ getBatch()

◆ getBranchBufferSize()

◆ GetEntries()

◆ GetEntry()

◆ initialize()

◆ isWeighted()

◆ loadValues() [1/2]

◆ loadValues() [2/2]

◆ makeTreeName()

◆ merge()

◆ numEntries()

◆ reset()

◆ Reset()

◆ resetBuffers()

◆ resetCache()

◆ restoreAlternateBuffers()

◆ row()

◆ setArgStatus()

◆ setBranchBufferSize()

◆ setExternalWeightArray()

◆ sumEntries()

◆ tree() [1/2]

◆ tree() [2/2]

◆ valid()

◆ varsNoWeight()

◆ weight() [1/2]

◆ weight() [2/2]

◆ weightError() [1/2]

◆ weightError() [2/2]

◆ weightVar()

Friends And Related Function Documentation

◆ RooVectorDataStore

Member Data Documentation

◆ _attachedBuffers

◆ _cacheOwner

◆ _cacheTree

◆ _curWgt

◆ _curWgtErr

◆ _curWgtErrHi

◆ _curWgtErrLo

◆ _defCtor

◆ _defTreeBufSize

◆ _extSumW2Array