RooMinimizer is a wrapper class around ROOT::Fit:Fitter that provides a seamless interface between the minimizer functionality and the native RooFit interface.

By default the Minimizer is MINUIT for classic mode and MINUIT2 for parallelized mode (activated with the RooFit::ModularL(true) parameter or by passing a RooRealL function as the minimization target). RooMinimizer can minimize any RooAbsReal function with respect to its parameters. Usual choices for minimization are RooNLLVar and RooChi2Var RooMinimizer has methods corresponding to MINUIT functions like hesse(), migrad(), minos() etc. In each of these function calls the state of the MINUIT engine is synchronized with the state of the RooFit variables: any change in variables, change in the constant status etc is forwarded to MINUIT prior to execution of the MINUIT call. Afterwards the RooFit objects are resynchronized with the output state of MINUIT: changes parameter values, errors are propagated. Various methods are available to control verbosity, profiling, automatic PDF optimization.

Definition at line 43 of file RooMinimizer.h.

Classes
struct	Config
	Config argument to RooMinimizer ctor. More...

Public Types
enum	PrintLevel { None = -1 , Reduced = 0 , Normal = 1 , ExtraForProblem = 2 , Maximum = 3 }

enum	Strategy { Speed = 0 , Balance = 1 , Robustness = 2 }

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 Member Functions
	RooMinimizer (RooAbsReal &function, Config const &cfg={})
	Construct MINUIT interface to given function.

	~RooMinimizer () override
	Destructor.

void	applyCovarianceMatrix (TMatrixDSym const &V)
	Apply results of given external covariance matrix.

void	clearStatusHistory ()
	Clears the Minuit status history.

RooPlot *	contour (RooRealVar &var1, RooRealVar &var2, double n1=1.0, double n2=2.0, double n3=0.0, double n4=0.0, double n5=0.0, double n6=0.0, unsigned int npoints=50)
	Create and draw a TH2 with the error contours in the parameters `var1` and `var2`.

int	evalCounter () const

ROOT::Fit::Fitter *	fitter ()
	Return underlying ROOT fitter object.

const ROOT::Fit::Fitter *	fitter () const
	Return underlying ROOT fitter object.

RooDataSet *	getLogDataSet () const
	If logging of function evaluations to a RooDataSet is enabled, returns a pointer to a dataset with one row per evaluation of the RooAbsReal passed to the minimizer.

ROOT::Math::IMultiGenFunction *	getMultiGenFcn () const

int	getNPar () const

int	hesse ()
	Execute HESSE.

int	improve ()
	Execute IMPROVE.

TClass *	IsA () const override

int	migrad ()
	Execute MIGRAD.

int	minimize (const char type, const char alg=nullptr)
	Minimise the function passed in the constructor.

std::string const &	minimizerType () const

int	minos ()
	Execute MINOS.

int	minos (const RooArgSet &minosParamList)
	Execute MINOS for given list of parameters.

void	optimizeConst (int flag)
	If flag is true, perform constant term optimization on function being minimized.

RooFit::OwningPtr< RooFitResult >	save (const char name=nullptr, const char title=nullptr)
	Save and return a RooFitResult snapshot of current minimizer status.

void	saveStatus (const char *label, int status)

int	seek ()
	Execute SEEK.

void	setEps (double eps)
	Change MINUIT epsilon.

void	setErrorLevel (double level)
	Set the level for MINUIT error analysis to the given value.

void	setEvalErrorWall (bool flag)

bool	setLogFile (const char *logf=nullptr)

void	setLoggingToDataSet (bool flag=true)
	Enable or disable the logging of function evaluations to a RooDataSet.

void	setMaxFunctionCalls (int n)
	Change maximum number of likelihood function class from MINUIT (RooMinimizer default 500 * #parameters)

void	setMaxIterations (int n)
	Change maximum number of MINUIT iterations (RooMinimizer default 500 * #parameters)

void	setMinimizerType (std::string const &type)
	Choose the minimizer algorithm.

void	setOffsetting (bool flag)
	Enable internal likelihood offsetting for enhanced numeric precision.

void	setPrintEvalErrors (int numEvalErrors)

void	setPrintLevel (int newLevel)
	Change the MINUIT internal printing level.

void	setProfile (bool flag=true)

void	setRecoverFromNaNStrength (double strength)
	Try to recover from invalid function values.

void	setStrategy (int istrat)
	Change MINUIT strategy to istrat.

void	setVerbose (bool flag=true)

int	simplex ()
	Execute SIMPLEX.

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

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

void	zeroEvalCount ()

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 void	cleanup ()
	Cleanup method called by atexit handler installed by RooSentinel to delete all global heap objects when the program is terminated.

static const char *	DeclFileName ()

static int	getPrintLevel ()
	Get the MINUIT internal printing level.

static RooFit::OwningPtr< RooFitResult >	lastMinuitFit ()

static RooFit::OwningPtr< RooFitResult >	lastMinuitFit (const RooArgList &varList)

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.

Private Member Functions
void	addParamsToProcessTimer ()
	Add parameters in metadata field to process timer.

bool	fitFcn () const

void	initMinimizerFcnDependentPart (double defaultErrorLevel)
	Initialize the part of the minimizer that is dependent on the function to be minimized.

void	initMinimizerFirstPart ()
	Initialize the part of the minimizer that is independent of the function to be minimized.

std::ofstream *	logfile ()

std::unique_ptr< RooAbsReal::EvalErrorContext >	makeEvalErrorContext () const

double &	maxFCN ()

void	profileStart ()
	Start profiling timer.

void	profileStop ()
	Stop profiling timer and report results of last session.

Private Attributes
RooMinimizer::Config	_cfg

TStopwatch	_cumulTimer

std::unique_ptr< TMatrixDSym >	_extV

std::unique_ptr< RooAbsMinimizerFcn >	_fcn

std::unique_ptr< RooDataSet >	_logDataSet

bool	_loggingToDataSet = false

bool	_profileStart = false

int	_status = -99

std::vector< std::pair< std::string, int > >	_statusHistory

TStopwatch	_timer

Static Private Attributes
static std::unique_ptr< ROOT::Fit::Fitter >	_theFitter = {}

Friends
class	RooAbsMinimizerFcn

class	RooMinimizerFcn

Additional Inherited Members
Protected Types inherited from TObject
enum	{ kOnlyPrepStep = (1ULL << ( 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 ()

#include <RooMinimizer.h>

Inheritance diagram for RooMinimizer:

[legend]

Member Enumeration Documentation

◆ PrintLevel

enum RooMinimizer::PrintLevel

Enumerator
None
Reduced
Normal
ExtraForProblem
Maximum

Definition at line 84 of file RooMinimizer.h.

◆ Strategy

enum RooMinimizer::Strategy

Enumerator
Speed
Balance
Robustness

Definition at line 83 of file RooMinimizer.h.

Constructor & Destructor Documentation

◆ RooMinimizer()

RooMinimizer::RooMinimizer	(	RooAbsReal &	function,
		Config const &	cfg = `{}`
	)

explicit

Construct MINUIT interface to given function.

Function can be anything, but is typically a -log(likelihood) implemented by RooNLLVar or a chi^2 (implemented by RooChi2Var). Other frequent use cases are a RooAddition of a RooNLLVar plus a penalty or constraint term. This class propagates all RooFit information (floating parameters, their values and errors) to MINUIT before each MINUIT call and propagates all MINUIT information back to the RooFit object at the end of each call (updated parameter values, their (asymmetric errors) etc. The default MINUIT error level for HESSE and MINOS error analysis is taken from the defaultErrorLevel() value of the input function. Constructor that accepts all configuration in struct with RooAbsReal likelihood

Definition at line 103 of file RooMinimizer.cxx.

◆ ~RooMinimizer()

RooMinimizer::~RooMinimizer ( )

overridedefault

Destructor.

Member Function Documentation

◆ addParamsToProcessTimer()

void RooMinimizer::addParamsToProcessTimer ( )

private

Add parameters in metadata field to process timer.

Definition at line 749 of file RooMinimizer.cxx.

◆ applyCovarianceMatrix()

void RooMinimizer::applyCovarianceMatrix ( TMatrixDSym const & V )

Apply results of given external covariance matrix.

i.e. propagate its errors to all RRV parameter representations and give this matrix instead of the HESSE matrix at the next save() call

Definition at line 805 of file RooMinimizer.cxx.

◆ Class()

static TClass * RooMinimizer::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * RooMinimizer::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t RooMinimizer::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 201 of file RooMinimizer.h.

◆ cleanup()

void RooMinimizer::cleanup ( )

static

Cleanup method called by atexit handler installed by RooSentinel to delete all global heap objects when the program is terminated.

Definition at line 85 of file RooMinimizer.cxx.

◆ clearStatusHistory()

void RooMinimizer::clearStatusHistory ( )

inline

Clears the Minuit status history.

Definition at line 145 of file RooMinimizer.h.

◆ contour()

RooPlot * RooMinimizer::contour	(	RooRealVar &	var1,
		RooRealVar &	var2,
		double	n1 = `1.0`,
		double	n2 = `2.0`,
		double	n3 = `0.0`,
		double	n4 = `0.0`,
		double	n5 = `0.0`,
		double	n6 = `0.0`,
		unsigned int	npoints = `50`
	)

Create and draw a TH2 with the error contours in the parameters var1 and var2.

Parameters

[in]	var1	The first parameter (x axis).
[in]	var2	The second parameter (y axis).
[in]	n1	First contour.
[in]	n2	Optional contour. 0 means don't draw.
[in]	n3	Optional contour. 0 means don't draw.
[in]	n4	Optional contour. 0 means don't draw.
[in]	n5	Optional contour. 0 means don't draw.
[in]	n6	Optional contour. 0 means don't draw.
[in]	npoints	Number of points for evaluating the contour.

Up to six contours can be drawn using the arguments n1 to n6 to request the desired coverage in units of \( \sigma = n^2 \cdot \mathrm{ErrorDef} \). See ROOT::Math::Minimizer::ErrorDef().

Definition at line 662 of file RooMinimizer.cxx.

◆ DeclFileName()

static const char * RooMinimizer::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 201 of file RooMinimizer.h.

◆ evalCounter()

int RooMinimizer::evalCounter ( ) const

Definition at line 936 of file RooMinimizer.cxx.

◆ fitFcn()

bool RooMinimizer::fitFcn ( ) const

private

Definition at line 299 of file RooMinimizer.cxx.

◆ fitter() [1/2]

ROOT::Fit::Fitter * RooMinimizer::fitter ( )

Return underlying ROOT fitter object.

Definition at line 286 of file RooMinimizer.cxx.

◆ fitter() [2/2]

ROOT::Fit::Fitter const * RooMinimizer::fitter ( ) const

Return underlying ROOT fitter object.

Definition at line 294 of file RooMinimizer.cxx.

◆ getLogDataSet()

RooDataSet * RooMinimizer::getLogDataSet ( ) const

inline

If logging of function evaluations to a RooDataSet is enabled, returns a pointer to a dataset with one row per evaluation of the RooAbsReal passed to the minimizer.

As columns, there are all floating parameters and the values they had for that evaluation.

See also: RooMinimizer::setLoggingToDataSet(bool).

Definition at line 128 of file RooMinimizer.h.

◆ getMultiGenFcn()

ROOT::Math::IMultiGenFunction * RooMinimizer::getMultiGenFcn ( ) const

Definition at line 794 of file RooMinimizer.cxx.

◆ getNPar()

int RooMinimizer::getNPar ( ) const

Definition at line 945 of file RooMinimizer.cxx.

◆ getPrintLevel()

int RooMinimizer::getPrintLevel ( )

static

Get the MINUIT internal printing level.

Definition at line 565 of file RooMinimizer.cxx.

◆ hesse()

int RooMinimizer::hesse ( )

Execute HESSE.

Changes in parameter values and calculated errors are automatically propagated back the RooRealVars representing the floating parameters in the MINUIT operation.

Definition at line 374 of file RooMinimizer.cxx.

◆ improve()

int RooMinimizer::improve ( )

Execute IMPROVE.

Changes in parameter values and calculated errors are automatically propagated back the RooRealVars representing the floating parameters in the MINUIT operation.

Definition at line 535 of file RooMinimizer.cxx.

◆ initMinimizerFcnDependentPart()

void RooMinimizer::initMinimizerFcnDependentPart ( double defaultErrorLevel )

private

Initialize the part of the minimizer that is dependent on the function to be minimized.

Definition at line 169 of file RooMinimizer.cxx.

◆ initMinimizerFirstPart()

void RooMinimizer::initMinimizerFirstPart ( )

private

Initialize the part of the minimizer that is independent of the function to be minimized.

Definition at line 158 of file RooMinimizer.cxx.

◆ IsA()

TClass * RooMinimizer::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from TObject.

Definition at line 201 of file RooMinimizer.h.

◆ lastMinuitFit() [1/2]

RooFit::OwningPtr< RooFitResult > RooMinimizer::lastMinuitFit ( )

static

Definition at line 811 of file RooMinimizer.cxx.

◆ lastMinuitFit() [2/2]

RooFit::OwningPtr< RooFitResult > RooMinimizer::lastMinuitFit ( const RooArgList & varList )

static

Definition at line 816 of file RooMinimizer.cxx.

◆ logfile()

std::ofstream * RooMinimizer::logfile ( )

private

Definition at line 950 of file RooMinimizer.cxx.

◆ makeEvalErrorContext()

std::unique_ptr< RooAbsReal::EvalErrorContext > RooMinimizer::makeEvalErrorContext ( ) const

private

Definition at line 968 of file RooMinimizer.cxx.

◆ maxFCN()

double & RooMinimizer::maxFCN ( )

private

Definition at line 954 of file RooMinimizer.cxx.

◆ migrad()

int RooMinimizer::migrad ( )

Execute MIGRAD.

Changes in parameter values and calculated errors are automatically propagated back the RooRealVars representing the floating parameters in the MINUIT operation.

Definition at line 349 of file RooMinimizer.cxx.

◆ minimize()

int RooMinimizer::minimize	(	const char *	type,
		const char *	alg = `nullptr`
	)

Minimise the function passed in the constructor.

Parameters

[in] type Type of fitter to use, e.g. "Minuit" "Minuit2". Passing an empty string will select the default minimizer type of the RooMinimizer, as returned by ROOT::Math::MinimizerOptions::DefaultMinimizerType().

Attention: This overrides the default fitter of this RooMinimizer.

Parameters

[in] alg Fit algorithm to use. (Optional)

Definition at line 312 of file RooMinimizer.cxx.

◆ minimizerType()

std::string const & RooMinimizer::minimizerType ( ) const

inline

Definition at line 133 of file RooMinimizer.h.

◆ minos() [1/2]

int RooMinimizer::minos ( )

Execute MINOS.

Changes in parameter values and calculated errors are automatically propagated back the RooRealVars representing the floating parameters in the MINUIT operation.

Definition at line 405 of file RooMinimizer.cxx.

◆ minos() [2/2]

int RooMinimizer::minos ( const RooArgSet & minosParamList )

Execute MINOS for given list of parameters.

Changes in parameter values and calculated errors are automatically propagated back the RooRealVars representing the floating parameters in the MINUIT operation.

Definition at line 437 of file RooMinimizer.cxx.

◆ optimizeConst()

void RooMinimizer::optimizeConst ( int flag )

If flag is true, perform constant term optimization on function being minimized.

Definition at line 574 of file RooMinimizer.cxx.

◆ profileStart()

void RooMinimizer::profileStart ( )

private

Start profiling timer.

Definition at line 770 of file RooMinimizer.cxx.

◆ profileStop()

void RooMinimizer::profileStop ( )

private

Stop profiling timer and report results of last session.

Definition at line 782 of file RooMinimizer.cxx.

◆ save()

RooFit::OwningPtr< RooFitResult > RooMinimizer::save	(	const char *	userName = `nullptr`,
		const char *	userTitle = `nullptr`
	)

Save and return a RooFitResult snapshot of current minimizer status.

This snapshot contains the values of all constant parameters, the value of all floating parameters at RooMinimizer construction and after the last MINUIT operation, the MINUIT status, variance quality, EDM setting, number of calls with evaluation problems, the minimized function value and the full correlation matrix.

Definition at line 587 of file RooMinimizer.cxx.

◆ saveStatus()

void RooMinimizer::saveStatus	(	const char *	label,
		int	status
	)

inline

Definition at line 139 of file RooMinimizer.h.

◆ seek()

int RooMinimizer::seek ( )

Execute SEEK.

Changes in parameter values and calculated errors are automatically propagated back the RooRealVars representing the floating parameters in the MINUIT operation.

Definition at line 485 of file RooMinimizer.cxx.

◆ setEps()

void RooMinimizer::setEps ( double eps )

Change MINUIT epsilon.

Definition at line 248 of file RooMinimizer.cxx.

◆ setErrorLevel()

void RooMinimizer::setErrorLevel ( double level )

Set the level for MINUIT error analysis to the given value.

This function overrides the default value that is taken in the RooMinimizer constructor from the defaultErrorLevel() method of the input function

Definition at line 240 of file RooMinimizer.cxx.

◆ setEvalErrorWall()

void RooMinimizer::setEvalErrorWall ( bool flag )

inline

Definition at line 96 of file RooMinimizer.h.

◆ setLogFile()

bool RooMinimizer::setLogFile ( const char * logf = nullptr )

Definition at line 927 of file RooMinimizer.cxx.

◆ setLoggingToDataSet()

void RooMinimizer::setLoggingToDataSet ( bool flag = true )

inline

Enable or disable the logging of function evaluations to a RooDataSet.

See also: RooMinimizer::getLogDataSet(). param[in] flag Boolean flag to disable or enable the functionality.

Definition at line 121 of file RooMinimizer.h.

◆ setMaxFunctionCalls()

void RooMinimizer::setMaxFunctionCalls ( int n )

Change maximum number of likelihood function class from MINUIT (RooMinimizer default 500 * #parameters)

Definition at line 229 of file RooMinimizer.cxx.

◆ setMaxIterations()

void RooMinimizer::setMaxIterations ( int n )

Change maximum number of MINUIT iterations (RooMinimizer default 500 * #parameters)

Definition at line 220 of file RooMinimizer.cxx.

◆ setMinimizerType()

void RooMinimizer::setMinimizerType ( std::string const & type )

Choose the minimizer algorithm.

Passing an empty string selects the default minimizer type returned by ROOT::Math::MinimizerOptions::DefaultMinimizerType().

Definition at line 268 of file RooMinimizer.cxx.

◆ setOffsetting()

void RooMinimizer::setOffsetting ( bool flag )

Enable internal likelihood offsetting for enhanced numeric precision.

Definition at line 256 of file RooMinimizer.cxx.

◆ setPrintEvalErrors()

void RooMinimizer::setPrintEvalErrors ( int numEvalErrors )

inline

Definition at line 99 of file RooMinimizer.h.

◆ setPrintLevel()

void RooMinimizer::setPrintLevel ( int newLevel )

Change the MINUIT internal printing level.

Definition at line 557 of file RooMinimizer.cxx.

◆ setProfile()

void RooMinimizer::setProfile ( bool flag = true )

inline

Definition at line 117 of file RooMinimizer.h.

◆ setRecoverFromNaNStrength()

void RooMinimizer::setRecoverFromNaNStrength ( double strength )

Try to recover from invalid function values.

When invalid function values are encountered, a penalty term is returned to the minimiser to make it back off. This sets the strength of this penalty.

Note: A strength of zero is equivalent to a constant penalty (= the gradient vanishes, ROOT < 6.24). Positive values lead to a gradient pointing away from the undefined regions. Use ~10 to force the minimiser away from invalid function values.

Definition at line 922 of file RooMinimizer.cxx.

◆ setStrategy()

void RooMinimizer::setStrategy ( int istrat )

Change MINUIT strategy to istrat.

Accepted codes are 0,1,2 and represent MINUIT strategies for dealing most efficiently with fast FCNs (0), expensive FCNs (2) and 'intermediate' FCNs (1)

Definition at line 211 of file RooMinimizer.cxx.

◆ setVerbose()

void RooMinimizer::setVerbose ( bool flag = true )

inline

Definition at line 100 of file RooMinimizer.h.

◆ simplex()

int RooMinimizer::simplex ( )

Execute SIMPLEX.

Changes in parameter values and calculated errors are automatically propagated back the RooRealVars representing the floating parameters in the MINUIT operation.

Definition at line 510 of file RooMinimizer.cxx.

◆ Streamer()

void RooMinimizer::Streamer ( TBuffer & R__b )

overridevirtual

Stream an object of class TObject.

Reimplemented from TObject.

◆ StreamerNVirtual()

void RooMinimizer::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 201 of file RooMinimizer.h.

◆ zeroEvalCount()

void RooMinimizer::zeroEvalCount ( )

Definition at line 940 of file RooMinimizer.cxx.

Friends And Related Symbol Documentation

◆ RooAbsMinimizerFcn

friend class RooAbsMinimizerFcn

friend

Definition at line 163 of file RooMinimizer.h.

◆ RooMinimizerFcn

friend class RooMinimizerFcn

friend

Definition at line 164 of file RooMinimizer.h.

Member Data Documentation

◆ _cfg

RooMinimizer::Config RooMinimizer::_cfg

private

Definition at line 199 of file RooMinimizer.h.

◆ _cumulTimer

TStopwatch RooMinimizer::_cumulTimer

private

Definition at line 187 of file RooMinimizer.h.

◆ _extV

std::unique_ptr<TMatrixDSym> RooMinimizer::_extV

private

Definition at line 189 of file RooMinimizer.h.

◆ _fcn

std::unique_ptr<RooAbsMinimizerFcn> RooMinimizer::_fcn

private

Definition at line 191 of file RooMinimizer.h.

◆ _logDataSet

std::unique_ptr<RooDataSet> RooMinimizer::_logDataSet

private

Definition at line 197 of file RooMinimizer.h.

◆ _loggingToDataSet

bool RooMinimizer::_loggingToDataSet = false

private

Definition at line 184 of file RooMinimizer.h.

◆ _profileStart

bool RooMinimizer::_profileStart = false

private

Definition at line 183 of file RooMinimizer.h.

◆ _status

int RooMinimizer::_status = -99

private

Definition at line 182 of file RooMinimizer.h.

◆ _statusHistory

std::vector<std::pair<std::string, int> > RooMinimizer::_statusHistory

private

Definition at line 195 of file RooMinimizer.h.

◆ _theFitter

std::unique_ptr< ROOT::Fit::Fitter > RooMinimizer::_theFitter = {}

staticprivate

Definition at line 193 of file RooMinimizer.h.

◆ _timer

TStopwatch RooMinimizer::_timer

private

Definition at line 186 of file RooMinimizer.h.

Libraries for RooMinimizer:

[legend]

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

roofit/roofitcore/inc/RooMinimizer.h
roofit/roofitcore/src/RooMinimizer.cxx

Classes

Public Types

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Friends

Additional Inherited Members

Member Enumeration Documentation

◆ PrintLevel

◆ Strategy

Constructor & Destructor Documentation

◆ RooMinimizer()

◆ ~RooMinimizer()

Member Function Documentation

◆ addParamsToProcessTimer()

◆ applyCovarianceMatrix()

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ cleanup()

◆ clearStatusHistory()

◆ contour()

◆ DeclFileName()

◆ evalCounter()

◆ fitFcn()

◆ fitter() [1/2]

◆ fitter() [2/2]

◆ getLogDataSet()

◆ getMultiGenFcn()

◆ getNPar()

◆ getPrintLevel()

◆ hesse()

◆ improve()

◆ initMinimizerFcnDependentPart()

◆ initMinimizerFirstPart()

◆ IsA()

◆ lastMinuitFit() [1/2]

◆ lastMinuitFit() [2/2]

◆ logfile()

◆ makeEvalErrorContext()

◆ maxFCN()

◆ migrad()

◆ minimize()

◆ minimizerType()

◆ minos() [1/2]

◆ minos() [2/2]

◆ optimizeConst()

◆ profileStart()

◆ profileStop()

◆ save()

◆ saveStatus()

◆ seek()

◆ setEps()

◆ setErrorLevel()

◆ setEvalErrorWall()

◆ setLogFile()

◆ setLoggingToDataSet()

◆ setMaxFunctionCalls()

◆ setMaxIterations()

◆ setMinimizerType()

◆ setOffsetting()

◆ setPrintEvalErrors()

◆ setPrintLevel()

◆ setProfile()

◆ setRecoverFromNaNStrength()

◆ setStrategy()

◆ setVerbose()

◆ simplex()

◆ Streamer()

◆ StreamerNVirtual()

◆ zeroEvalCount()

Friends And Related Symbol Documentation

◆ RooAbsMinimizerFcn

◆ RooMinimizerFcn

Member Data Documentation

◆ _cfg

◆ _cumulTimer

◆ _extV