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RooFoamGenerator Class Reference

Class RooFoamGenerator is a generic toy monte carlo generator that implement the TFOAM sampling technique on any positively valued function.

The RooFoamGenerator generator is used by the various generator context classes to take care of generation of observables for which p.d.fs do not define internal methods.

The foam generator reacts to the following config options:

  • nCell[123N]D
  • nSample
  • chatLevel Access those using: myPdf->specialGeneratorConfig()->getConfigSection("RooFoamGenerator").setRealValue("nSample",1e4);
See also
rf902_numgenconfig.C

Definition at line 31 of file RooFoamGenerator.h.

Public Member Functions

 RooFoamGenerator ()
 
 RooFoamGenerator (const RooAbsReal &func, const RooArgSet &genVars, const RooNumGenConfig &config, Bool_t verbose=kFALSE, const RooAbsReal *maxFuncVal=0)
 
virtual ~RooFoamGenerator ()
 Destructor.
 
virtual Bool_t canSampleCategories () const
 
virtual Bool_t canSampleConditional () const
 
RooAbsNumGeneratorclone (const RooAbsReal &func, const RooArgSet &genVars, const RooArgSet &, const RooNumGenConfig &config, Bool_t verbose=kFALSE, const RooAbsReal *maxFuncVal=0) const
 
TFoamengine ()
 
const RooArgSetgenerateEvent (UInt_t remaining, Double_t &resampleRatio)
 are we actually generating anything? (the cache always contains at least our function value)
 
- Public Member Functions inherited from RooAbsNumGenerator
 RooAbsNumGenerator ()
 
 RooAbsNumGenerator (const RooAbsReal &func, const RooArgSet &genVars, Bool_t verbose=kFALSE, const RooAbsReal *maxFuncVal=0)
 Initialize an accept-reject generator for the specified distribution function, which must be non-negative but does not need to be normalized over the variables to be generated, genVars.
 
virtual ~RooAbsNumGenerator ()
 Destructor.
 
void attachParameters (const RooArgSet &vars)
 Reattach original parameters to function clone.
 
virtual Double_t getFuncMax ()
 
Bool_t isValid () const
 
Bool_t isVerbose () const
 
virtual void Print (Option_t *options=0) const
 Print TNamed name and title.
 
virtual void printArgs (std::ostream &os) const
 Print the arguments of the generator.
 
virtual void printClassName (std::ostream &os) const
 Print the class name of the generator.
 
virtual void printName (std::ostream &os) const
 Print name of the generator.
 
virtual void printTitle (std::ostream &os) const
 Print the title of the generator.
 
void setVerbose (Bool_t verbose=kTRUE)
 
- 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.
 
virtual void Clear (Option_t *option="")
 Set name and title to empty strings ("").
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility.
 
virtual Int_t Compare (const TObject *obj) const
 Compare two TNamed objects.
 
virtual void Copy (TObject &named) const
 Copy this to obj.
 
virtual void FillBuffer (char *&buffer)
 Encode TNamed into output buffer.
 
virtual const char * GetName () const
 Returns name of object.
 
virtual const char * GetTitle () const
 Returns title of object.
 
virtual ULong_t Hash () const
 Return hash value for this object.
 
virtual Bool_t IsSortable () const
 
virtual void ls (Option_t *option="") const
 List TNamed name and title.
 
TNamedoperator= (const TNamed &rhs)
 TNamed assignment operator.
 
virtual void SetName (const char *name)
 Set the name of the TNamed.
 
virtual void SetNameTitle (const char *name, const char *title)
 Set all the TNamed parameters (name and title).
 
virtual void SetTitle (const char *title="")
 Set the title of the TNamed.
 
virtual Int_t Sizeof () const
 Return size of the TNamed part of the TObject.
 
- 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 TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad).
 
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=0)
 Execute method on this object with the given parameter string, e.g.
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=0)
 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 TObjectFindObject (const char *name) const
 Must be redefined in derived classes.
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes.
 
virtual Option_tGetDrawOption () 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_tGetOption () 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.
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete.
 
void operator delete (void *ptr)
 Operator delete.
 
void operator delete[] (void *ptr)
 Operator delete [].
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (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.
 
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=0, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory.
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory.
 
- Public Member Functions inherited from RooPrintable
 RooPrintable ()
 
virtual ~RooPrintable ()
 
virtual Int_t defaultPrintContents (Option_t *opt) const
 Default choice of contents to be printed (name and value)
 
virtual StyleOption defaultPrintStyle (Option_t *opt) const
 
virtual void printAddress (std::ostream &os) const
 Print class name of object.
 
virtual void printExtras (std::ostream &os) const
 Interface to print extras of object.
 
virtual void printMultiline (std::ostream &os, Int_t contents, Bool_t verbose=kFALSE, TString indent="") const
 Interface for detailed printing of object.
 
virtual void printStream (std::ostream &os, Int_t contents, StyleOption style, TString indent="") const
 Print description of object on ostream, printing contents set by contents integer, which is interpreted as an OR of 'enum ContentsOptions' values and in the style given by 'enum StyleOption'.
 
virtual void printTree (std::ostream &os, TString indent="") const
 Interface for tree structure printing of object.
 
virtual void printValue (std::ostream &os) const
 Interface to print value of object.
 

Static Protected Member Functions

static void registerSampler (RooNumGenFactory &fact)
 Register RooIntegrator1D, is parameters and capabilities with RooNumIntFactory.
 

Protected Attributes

RooTFoamBinding_binding
 
Double_t_range
 
TFoam_tfoam
 
Double_t_vec
 
Double_t_xmin
 
- Protected Attributes inherited from RooAbsNumGenerator
RooDataSet_cache
 
RooArgSet _catVars
 
RooArgSet_cloneSet
 
RooAbsReal_funcClone
 
const RooAbsReal_funcMaxVal
 
RooRealVar_funcValPtr
 
RooRealVar_funcValStore
 
Bool_t _isValid
 
RooArgSet _realVars
 
Bool_t _verbose
 
- Protected Attributes inherited from TNamed
TString fName
 
TString fTitle
 

Friends

class RooNumGenFactory
 

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 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 std::ostream & defaultPrintStream (std::ostream *os=0)
 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 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).
 
void MakeZombie ()
 
- Static Protected Attributes inherited from RooPrintable
static Int_t _nameLength
 

#include <RooFoamGenerator.h>

Inheritance diagram for RooFoamGenerator:
[legend]

Constructor & Destructor Documentation

◆ RooFoamGenerator() [1/2]

RooFoamGenerator::RooFoamGenerator ( )
inline

Definition at line 33 of file RooFoamGenerator.h.

◆ RooFoamGenerator() [2/2]

RooFoamGenerator::RooFoamGenerator ( const RooAbsReal func,
const RooArgSet genVars,
const RooNumGenConfig config,
Bool_t  verbose = kFALSE,
const RooAbsReal maxFuncVal = 0 
)

Definition at line 89 of file RooFoamGenerator.cxx.

◆ ~RooFoamGenerator()

RooFoamGenerator::~RooFoamGenerator ( )
virtual

Destructor.

Definition at line 126 of file RooFoamGenerator.cxx.

Member Function Documentation

◆ canSampleCategories()

virtual Bool_t RooFoamGenerator::canSampleCategories ( ) const
inlinevirtual

Reimplemented from RooAbsNumGenerator.

Definition at line 46 of file RooFoamGenerator.h.

◆ canSampleConditional()

virtual Bool_t RooFoamGenerator::canSampleConditional ( ) const
inlinevirtual

Reimplemented from RooAbsNumGenerator.

Definition at line 45 of file RooFoamGenerator.h.

◆ clone()

RooAbsNumGenerator * RooFoamGenerator::clone ( const RooAbsReal func,
const RooArgSet genVars,
const RooArgSet ,
const RooNumGenConfig config,
Bool_t  verbose = kFALSE,
const RooAbsReal maxFuncVal = 0 
) const
inlinevirtual

Implements RooAbsNumGenerator.

Definition at line 35 of file RooFoamGenerator.h.

◆ engine()

TFoam & RooFoamGenerator::engine ( )
inline

Definition at line 43 of file RooFoamGenerator.h.

◆ generateEvent()

const RooArgSet * RooFoamGenerator::generateEvent ( UInt_t  remaining,
Double_t resampleRatio 
)
virtual

are we actually generating anything? (the cache always contains at least our function value)

Implements RooAbsNumGenerator.

Definition at line 140 of file RooFoamGenerator.cxx.

◆ registerSampler()

void RooFoamGenerator::registerSampler ( RooNumGenFactory fact)
staticprotected

Register RooIntegrator1D, is parameters and capabilities with RooNumIntFactory.

Definition at line 70 of file RooFoamGenerator.cxx.

Friends And Related Symbol Documentation

◆ RooNumGenFactory

friend class RooNumGenFactory
friend

Definition at line 50 of file RooFoamGenerator.h.

Member Data Documentation

◆ _binding

RooTFoamBinding* RooFoamGenerator::_binding
protected

Definition at line 53 of file RooFoamGenerator.h.

◆ _range

Double_t* RooFoamGenerator::_range
protected

Definition at line 56 of file RooFoamGenerator.h.

◆ _tfoam

TFoam* RooFoamGenerator::_tfoam
protected

Definition at line 54 of file RooFoamGenerator.h.

◆ _vec

Double_t* RooFoamGenerator::_vec
protected

Definition at line 57 of file RooFoamGenerator.h.

◆ _xmin

Double_t* RooFoamGenerator::_xmin
protected

Definition at line 55 of file RooFoamGenerator.h.

Libraries for RooFoamGenerator:

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