This PDEFoam variant acts like a decision tree and stores in every cell the discriminant.

 D = #events with given class / total number of events

as well as the statistical error on the discriminant. It therefore acts as a discriminant estimator. The decision tree-like behaviour is achieved by overriding PDEFoamDiscriminant::Explore() to use a decision tree-like cell splitting algorithm (given a separation type).

This PDEFoam variant should be booked together with the PDEFoamDecisionTreeDensity density estimator, which returns the events in a cell without sampling.

Definition at line 39 of file PDEFoamDecisionTree.h.

Public Member Functions
	PDEFoamDecisionTree ()
	Default constructor for streamer, user should not use it.

	PDEFoamDecisionTree (const TString &, SeparationBase *sepType, UInt_t cls)
	Parameters:

virtual	~PDEFoamDecisionTree ()
	Destructor deletes fSepType.

virtual TClass *	IsA () const

virtual void	Streamer (TBuffer &)
	Stream an object of class TObject.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TMVA::PDEFoamDiscriminant
	PDEFoamDiscriminant ()
	Default constructor for streamer, user should not use it.

	PDEFoamDiscriminant (const TString &, UInt_t)

virtual	~PDEFoamDiscriminant ()

virtual void	FillFoamCells (const Event *ev, Float_t wt)
	This function fills an event into the discriminant PDEFoam.

virtual void	Finalize ()
	Calc discriminator and its error for every cell and save it to the cell.

virtual TH2D *	Project2 (Int_t, Int_t, ECellValue, PDEFoamKernelBase *, UInt_t)
	Project foam variable idim1 and variable idim2 to histogram.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TMVA::PDEFoam
	PDEFoam ()
	Default constructor for streamer, user should not use it.

	PDEFoam (const TString &)
	User constructor, to be employed by the user.

virtual	~PDEFoam ()
	Default destructor.

void	AddVariableName (const char *s)

void	AddVariableName (TObjString *s)

void	CheckAll (Int_t)
	User utility, miscellaneous and debug.

void	Create ()
	Basic initialization of FOAM invoked by the user.

void	DeleteBinarySearchTree ()
	Delete the foam's density estimator, which contains the binary search tree.

TH1D *	Draw1Dim (ECellValue cell_value, Int_t nbin, PDEFoamKernelBase *kernel=nullptr)
	Draws 1-dimensional foam (= histogram)

void	FillBinarySearchTree (const Event *ev)
	Insert event to internal foam's density estimator PDEFoamDensityBase.

virtual Float_t	GetCellValue (const PDEFoamCell *cell, ECellValue cv)
	Returns the cell value of 'cell' corresponding to the given option 'cv'.

virtual std::vector< Float_t >	GetCellValue (const std::map< Int_t, Float_t > &xvec, ECellValue cv)
	This function finds all cells, which corresponds to the given (incomplete) untransformed event vector 'xvec' and returns the cell values, according to the parameter 'cv'.

virtual Float_t	GetCellValue (const std::vector< Float_t > &xvec, ECellValue cv, PDEFoamKernelBase *)
	This function finds the cell, which corresponds to the given untransformed event vector 'xvec' and return its value, which is given by the parameter 'cv'.

TString	GetFoamName () const

UInt_t	GetMaxDepth () const

UInt_t	GetNActiveCells () const

UInt_t	GetNCells () const

UInt_t	GetNInActiveCells () const

UInt_t	GetNmin ()

PDEFoamCell *	GetRootCell () const

Int_t	GetTotDim () const

TObjString *	GetVariableName (Int_t idx)

Double_t	GetXmax (Int_t idim) const

Double_t	GetXmin (Int_t idim) const

void	Initialize ()

MsgLogger &	Log () const

void	PrintCell (Long_t iCell=0)
	Prints geometry of and elements of 'iCell', as well as relations to parent and daughter cells.

void	PrintCells ()
	Prints geometry of ALL cells of the FOAM.

void	ResetCellElements ()
	Remove the cell elements from all cells.

void	RootPlot2dim (const TString &filename, TString opt, Bool_t createCanvas=kTRUE, Bool_t colors=kTRUE)
	Debugging tool which plots the cells of a 2-dimensional PDEFoam as rectangles in C++ format readable for ROOT.

void	SetDensity (PDEFoamDensityBase *dens)

void	SetDim (Int_t kDim)
	Sets dimension of cubical space.

void	SetEvPerBin (Int_t EvPerBin)

void	SetInhiDiv (Int_t, Int_t)
	This can be called before Create, after setting kDim It defines which variables are excluded in the process of the cell division.

void	SetMaxDepth (UInt_t maxdepth)

void	SetnBin (Int_t nBin)

void	SetnCells (Long_t nCells)

void	SetNmin (UInt_t val)

void	SetnSampl (Long_t nSampl)

void	SetXmax (Int_t idim, Double_t wmax)
	set upper foam bound in dimension idim

void	SetXmin (Int_t idim, Double_t wmin)
	set lower foam bound in dimension idim

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

std::vector< Float_t >	VarTransform (const std::vector< Float_t > &invec) const

Float_t	VarTransform (Int_t idim, Float_t x) const

std::vector< Float_t >	VarTransformInvers (const std::vector< Float_t > &invec) const

Float_t	VarTransformInvers (Int_t idim, Float_t x) const

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

	TObject (const TObject &object)
	TObject copy ctor.

virtual	~TObject ()
	TObject destructor.

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

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

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

ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

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

virtual void	Clear (Option_t *="")

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

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

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

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

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

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

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

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad with: `gROOT->SetSelectedPad(c1)`.

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

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

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

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

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

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

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

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

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

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

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

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

virtual Option_t *	GetOption () const

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

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

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

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

Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

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

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

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

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

void	InvertBit (UInt_t f)

Bool_t	IsDestructed () const
	IsDestructed.

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

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

R__ALWAYS_INLINE Bool_t	IsOnHeap () const

virtual Bool_t	IsSortable () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

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

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).

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

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

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

void	ResetBit (UInt_t f)

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

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

void	SetBit (UInt_t f)

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

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

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

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.

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 TMVA::PDEFoamDiscriminant
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

Static Public Member Functions inherited from TMVA::PDEFoam
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.

Protected Member Functions
	PDEFoamDecisionTree (const PDEFoamDecisionTree &)
	Copy Constructor NOT IMPLEMENTED (NEVER USED)

virtual void	Explore (PDEFoamCell *Cell)
	Internal subprogram used by Create.

Protected Member Functions inherited from TMVA::PDEFoamDiscriminant
	PDEFoamDiscriminant (const PDEFoamDiscriminant &)
	Copy Constructor NOT IMPLEMENTED (NEVER USED)

Protected Member Functions inherited from TMVA::PDEFoam
	PDEFoam (const PDEFoam &)
	Copy Constructor NOT IMPLEMENTED (NEVER USED)

Int_t	CellFill (Int_t, PDEFoamCell *)
	Internal subprogram used by Create.

virtual Bool_t	CellValueIsUndefined (PDEFoamCell *)
	Returns true, if the value of the given cell is undefined.

Int_t	Divide (PDEFoamCell *)
	Internal subprogram used by Create.

Double_t	Eval (Double_t *xRand, Double_t &event_density)
	Internal subprogram.

PDEFoamCell *	FindCell (const std::vector< Float_t > &) const
	Find cell that contains 'xvec' (in foam coordinates [0,1]).

std::vector< TMVA::PDEFoamCell * >	FindCells (const std::map< Int_t, Float_t > &) const
	Find all cells, that contain the coordinates specified in txvec.

void	FindCells (const std::map< Int_t, Float_t > &, PDEFoamCell , std::vector< PDEFoamCell > &) const
	This is a helper function for std::vector<PDEFoamCell> FindCells(...) and a generalisation of PDEFoamCell FindCell().

std::vector< TMVA::PDEFoamCell * >	FindCells (const std::vector< Float_t > &) const
	Find all cells, that contain txvec.

Double_t	GetCellElement (const PDEFoamCell *cell, UInt_t i) const
	Returns cell element i of cell 'cell'.

PDEFoamDensityBase *	GetDistr () const

void	Grow ()
	Internal subprogram used by Create.

void	InitCells ()
	Internal subprogram used by Create.

void	MakeAlpha ()
	Internal subprogram used by Create.

void	OutputGrow (Bool_t finished=false)
	Overridden function of PDEFoam to avoid native foam output.

Long_t	PeekMax ()
	Internal subprogram used by Create.

void	SetCellElement (PDEFoamCell *cell, UInt_t i, Double_t value)
	Set cell element i of cell to value.

template<typename T >
T	Sqr (T x) const

void	Varedu (Double_t[5], Int_t &, Double_t &, Double_t &)
	Internal subprogram used by Create.

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 ()

Private Attributes
SeparationBase *	fSepType

Additional Inherited Members
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 )) }

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = (1ULL << ( 3 )) }

Protected Attributes inherited from TMVA::PDEFoamDiscriminant
UInt_t	fClass

Protected Attributes inherited from TMVA::PDEFoam
Double_t *	fAlpha
	[fDim] Internal parameters of the hyperrectangle

PDEFoamCell **	fCells
	[fNCells] Array of ALL cells

Int_t	fDim
	Dimension of the integration/simulation space.

PDEFoamDensityBase *	fDistr
	! distribution of training events

EDTSeparation	fDTSeparation
	BACKWARDS COMPATIBILITY: split cells according to decision tree logic.

Int_t	fEvPerBin
	Maximum number of effective (wt=1) events per bin.

Bool_t	fFillFoamWithOrigWeights
	BACKWARDS COMPATIBILITY: fill the foam with boost or orig. weights.

EFoamType	fFoamType
	BACKWARDS COMPATIBILITY: type of foam.

TObjArray *	fHistEdg
	Histograms of wt, one for each cell edge.

Int_t *	fInhiDiv
	! [fDim] Flags for inhibiting cell division

Int_t	fLastCe
	Index of the last cell.

MsgLogger *	fLogger
	! message logger

Int_t *	fMaskDiv
	! [fDim] Dynamic Mask for cell division

UInt_t	fMaxDepth
	maximum depth of cell tree

TString	fName
	Name of a given instance of the FOAM class.

Int_t	fNBin
	No. of bins in the edge histogram for cell MC exploration.

Int_t	fNCells
	Maximum number of cells.

UInt_t	fNElements
	BACKWARDS COMPATIBILITY: number of variables in every cell.

UInt_t	fNmin
	minimal number of events in cell to split cell

Int_t	fNoAct
	Number of active cells.

Int_t	fNSampl
	No. of MC events, when dividing (exploring) cell.

Bool_t	fPeekMax
	BACKWARDS COMPATIBILITY: peek up cell with max. driver integral for split.

TRandom3 *	fPseRan
	Pointer to user-defined generator of pseudorandom numbers.

Double_t *	fRvec
	[fDim] random number vector from r.n. generator fDim+1 maximum elements

Timer *	fTimer
	! timer for graphical output

TObjArray *	fVariableNames
	collection of all variable names

Float_t	fVolFrac
	BACKWARDS COMPATIBILITY: volume fraction (with respect to total phase space.

Double_t *	fXmax
	[fDim] maximum for variable transform

Double_t *	fXmin
	[fDim] minimum for variable transform

#include <TMVA/PDEFoamDecisionTree.h>

Inheritance diagram for TMVA::PDEFoamDecisionTree:

[legend]

Constructor & Destructor Documentation

◆ PDEFoamDecisionTree() [1/3]

TMVA::PDEFoamDecisionTree::PDEFoamDecisionTree ( const PDEFoamDecisionTree & from )

protected

Copy Constructor NOT IMPLEMENTED (NEVER USED)

Definition at line 94 of file PDEFoamDecisionTree.cxx.

◆ PDEFoamDecisionTree() [2/3]

TMVA::PDEFoamDecisionTree::PDEFoamDecisionTree ( )

Default constructor for streamer, user should not use it.

Definition at line 69 of file PDEFoamDecisionTree.cxx.

◆ PDEFoamDecisionTree() [3/3]

TMVA::PDEFoamDecisionTree::PDEFoamDecisionTree	(	const TString &	name,
		SeparationBase *	sepType,
		UInt_t	cls
	)

Parameters:

name - name of the foam
sepType - separation type used for the cell splitting (will be deleted in the destructor)
cls - class to consider as signal when calculating the purity

Definition at line 85 of file PDEFoamDecisionTree.cxx.

◆ ~PDEFoamDecisionTree()

TMVA::PDEFoamDecisionTree::~PDEFoamDecisionTree ( )

virtual

Destructor deletes fSepType.

Definition at line 105 of file PDEFoamDecisionTree.cxx.

Member Function Documentation

◆ Class()

static TClass * TMVA::PDEFoamDecisionTree::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * TMVA::PDEFoamDecisionTree::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t TMVA::PDEFoamDecisionTree::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 57 of file PDEFoamDecisionTree.h.

◆ DeclFileName()

static const char * TMVA::PDEFoamDecisionTree::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 57 of file PDEFoamDecisionTree.h.

◆ Explore()

void TMVA::PDEFoamDecisionTree::Explore ( PDEFoamCell * cell )

protectedvirtual

Internal subprogram used by Create.

It explores newly defined cell with according to the decision tree logic. The separation set via the 'sepType' option in the constructor.

The optimal division point for eventual future cell division is determined/recorded. Note that links to parents and initial volume = 1/2 parent has to be already defined prior to calling this routine.

Note, that according to the decision tree logic, a cell is only split, if the number of (unweighted) events in each daughter cell is greater than fNmin.

Reimplemented from TMVA::PDEFoam.

Definition at line 125 of file PDEFoamDecisionTree.cxx.

◆ IsA()

virtual TClass * TMVA::PDEFoamDecisionTree::IsA ( ) const

inlinevirtual

Returns: TClass describing current object

Reimplemented from TMVA::PDEFoamDiscriminant.

Definition at line 57 of file PDEFoamDecisionTree.h.

◆ Streamer()

virtual void TMVA::PDEFoamDecisionTree::Streamer ( TBuffer & R__b )

virtual

Stream an object of class TObject.

Reimplemented from TMVA::PDEFoamDiscriminant.

◆ StreamerNVirtual()

void TMVA::PDEFoamDecisionTree::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 57 of file PDEFoamDecisionTree.h.

Member Data Documentation

◆ fSepType

SeparationBase* TMVA::PDEFoamDecisionTree::fSepType

private

Definition at line 43 of file PDEFoamDecisionTree.h.

Libraries for TMVA::PDEFoamDecisionTree:

[legend]

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

tmva/tmva/inc/TMVA/PDEFoamDecisionTree.h
tmva/tmva/src/PDEFoamDecisionTree.cxx

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ PDEFoamDecisionTree() [1/3]

◆ PDEFoamDecisionTree() [2/3]

◆ PDEFoamDecisionTree() [3/3]

◆ ~PDEFoamDecisionTree()

Member Function Documentation

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ DeclFileName()

◆ Explore()

◆ IsA()

◆ Streamer()

◆ StreamerNVirtual()

Member Data Documentation

◆ fSepType