TMinuitMinimizer Class Reference

#include <TMinuitMinimizer.h>

Inheritance diagram for TMinuitMinimizer:

List of all members.

Public Member Functions
	TMinuitMinimizer (ROOT::Minuit::EMinimizerType type=ROOT::Minuit::kMigrad, unsigned int ndim=0)
	TMinuitMinimizer (const char *type, unsigned int ndim=0)
	~TMinuitMinimizer ()
virtual void	SetFunction (const ROOT::Math::IMultiGenFunction &func)
	set the function to minimize
virtual void	SetFunction (const ROOT::Math::IMultiGradFunction &func)
	set the function to minimize
virtual bool	SetVariable (unsigned int ivar, const std::string &name, double val, double step)
	set free variable
virtual bool	SetLimitedVariable (unsigned int ivar, const std::string &name, double val, double step, double, double)
	set upper/lower limited variable (override if minimizer supports them )
virtual bool	SetFixedVariable (unsigned int, const std::string &, double)
	set fixed variable (override if minimizer supports them )
virtual bool	SetVariableValue (unsigned int, double)
	set the value of an existing variable
virtual bool	Minimize ()
	method to perform the minimization
virtual double	MinValue () const
	return minimum function value
virtual double	Edm () const
	return expected distance reached from the minimum
virtual const double *	X () const
	return pointer to X values at the minimum
virtual const double *	MinGradient () const
	return pointer to gradient values at the minimum
virtual unsigned int	NCalls () const
	number of function calls to reach the minimum
virtual unsigned int	NDim () const
virtual unsigned int	NFree () const
virtual bool	ProvidesError () const
	minimizer provides error and error matrix
virtual const double *	Errors () const
	return errors at the minimum
virtual double	CovMatrix (unsigned int i, unsigned int j) const
virtual int	CovMatrixStatus () const
	return status of covariance matrix
virtual double	GlobalCC (unsigned int) const
	global correlation coefficient for variable i
virtual bool	GetMinosError (unsigned int i, double &errLow, double &errUp, int=0)
	minos error for variable i, return false if Minos failed
virtual bool	Hesse ()
virtual bool	Scan (unsigned int i, unsigned int &nstep, double *x, double *y, double xmin=0, double xmax=0)
virtual bool	Contour (unsigned int i, unsigned int j, unsigned int &npoints, double *xi, double *xj)
virtual void	PrintResults ()
	print the result according to set level (implemented for TMinuit for mantaining Minuit-style printing)
virtual std::string	VariableName (unsigned int ivar) const
	get name of variables (override if minimizer support storing of variable names)
virtual int	VariableIndex (const std::string &name) const
	TMinuitMinimizer (ROOT::Minuit::EMinimizerType type=ROOT::Minuit::kMigrad, unsigned int ndim=0)
	TMinuitMinimizer (const char *type, unsigned int ndim=0)
	~TMinuitMinimizer ()
virtual void	SetFunction (const ROOT::Math::IMultiGenFunction &func)
	set the function to minimize
virtual void	SetFunction (const ROOT::Math::IMultiGradFunction &func)
	set the function to minimize
virtual bool	SetVariable (unsigned int ivar, const std::string &name, double val, double step)
	set free variable
virtual bool	SetLimitedVariable (unsigned int ivar, const std::string &name, double val, double step, double, double)
	set upper/lower limited variable (override if minimizer supports them )
virtual bool	SetFixedVariable (unsigned int, const std::string &, double)
	set fixed variable (override if minimizer supports them )
virtual bool	SetVariableValue (unsigned int, double)
	set the value of an existing variable
virtual bool	Minimize ()
	method to perform the minimization
virtual double	MinValue () const
	return minimum function value
virtual double	Edm () const
	return expected distance reached from the minimum
virtual const double *	X () const
	return pointer to X values at the minimum
virtual const double *	MinGradient () const
	return pointer to gradient values at the minimum
virtual unsigned int	NCalls () const
	number of function calls to reach the minimum
virtual unsigned int	NDim () const
virtual unsigned int	NFree () const
virtual bool	ProvidesError () const
	minimizer provides error and error matrix
virtual const double *	Errors () const
	return errors at the minimum
virtual double	CovMatrix (unsigned int i, unsigned int j) const
virtual int	CovMatrixStatus () const
	return status of covariance matrix
virtual double	GlobalCC (unsigned int) const
	global correlation coefficient for variable i
virtual bool	GetMinosError (unsigned int i, double &errLow, double &errUp, int=0)
	minos error for variable i, return false if Minos failed
virtual bool	Hesse ()
virtual bool	Scan (unsigned int i, unsigned int &nstep, double *x, double *y, double xmin=0, double xmax=0)
virtual bool	Contour (unsigned int i, unsigned int j, unsigned int &npoints, double *xi, double *xj)
virtual void	PrintResults ()
	print the result according to set level (implemented for TMinuit for mantaining Minuit-style printing)
virtual std::string	VariableName (unsigned int ivar) const
	get name of variables (override if minimizer support storing of variable names)
virtual int	VariableIndex (const std::string &name) const
Static Public Member Functions
static bool	UseStaticMinuit (bool on=true)
static bool	UseStaticMinuit (bool on=true)
Protected Member Functions
void	InitTMinuit (int ndim)
	initialize the TMinuit instance
void	DoClear ()
	reset
void	DoReleaseFixParameter (int ivar)
	release a parameter that is fixed when it is redefined
void	RetrieveParams ()
	retrieve minimum parameters and errors from TMinuit
void	RetrieveErrorMatrix ()
	retrieve error matrix from TMinuit
void	InitTMinuit (int ndim)
	initialize the TMinuit instance
void	DoClear ()
	reset
void	DoReleaseFixParameter (int ivar)
	release a parameter that is fixed when it is redefined
void	RetrieveParams ()
	retrieve minimum parameters and errors from TMinuit
void	RetrieveErrorMatrix ()
	retrieve error matrix from TMinuit
Static Protected Member Functions
static void	Fcn (int &, double *, double &f, double *, int)
	implementation of FCN for Minuit
static void	FcnGrad (int &, double *g, double &f, double *, int)
	implementation of FCN for Minuit when user provided gradient is used
static void	Fcn (int &, double *, double &f, double *, int)
	implementation of FCN for Minuit
static void	FcnGrad (int &, double *g, double &f, double *, int)
	implementation of FCN for Minuit when user provided gradient is used
Private Member Functions
	TMinuitMinimizer (const TMinuitMinimizer &)
TMinuitMinimizer &	operator= (const TMinuitMinimizer &rhs)
	TMinuitMinimizer (const TMinuitMinimizer &)
TMinuitMinimizer &	operator= (const TMinuitMinimizer &rhs)
Private Attributes
bool	fUsed
bool	fMinosRun
unsigned int	fDim
unsigned int	fStrategy
std::vector< double >	fParams
std::vector< double >	fErrors
std::vector< double >	fCovar
ROOT::Minuit::EMinimizerType	fType
TMinuit *	fMinuit
std::vector< double >	fParams
std::vector< double >	fErrors
std::vector< double >	fCovar
TMinuit *	fMinuit
Static Private Attributes
static ROOT::Math::IMultiGenFunction *	fgFunc
static TMinuit *	fgMinuit
static bool	fgUsed
static bool	fgUseStaticMinuit
static ROOT::Math::IMultiGenFunction *	fgFunc
static TMinuit *	fgMinuit

---

Detailed Description

TMinuitMinimizer class: minimizer implementation based on TMinuit.

Definition at line 51 of file TMinuitMinimizer.h.

---

Constructor & Destructor Documentation

TMinuitMinimizer::TMinuitMinimizer	(	ROOT::Minuit::EMinimizerType	type = ROOT::Minuit::kMigrad,
		unsigned int	ndim = 0
	)

Default constructor

TMinuitMinimizer::TMinuitMinimizer	(	const char *	type,
		unsigned int	ndim = 0
	)

Constructor from a char * (used by PM)

Definition at line 66 of file TMinuitMinimizer.cxx.

References fDim, fType, InitTMinuit(), int, ROOT::Minuit::kCombined, ROOT::Minuit::kMigrad, ROOT::Minuit::kMigradImproved, ROOT::Minuit::kScan, ROOT::Minuit::kSeek, ROOT::Minuit::kSimplex, and transform.

TMinuitMinimizer::~TMinuitMinimizer

(

)

Destructor (no operations)

Definition at line 95 of file TMinuitMinimizer.cxx.

References fgMinuit, fgUseStaticMinuit, and fMinuit.

TMinuitMinimizer::TMinuitMinimizer

(

const TMinuitMinimizer &

)

[private]

Copy constructor

Definition at line 104 of file TMinuitMinimizer.cxx.

TMinuitMinimizer::TMinuitMinimizer	(	ROOT::Minuit::EMinimizerType	type = ROOT::Minuit::kMigrad,
		unsigned int	ndim = 0
	)

Default constructor

TMinuitMinimizer::TMinuitMinimizer	(	const char *	type,
		unsigned int	ndim = 0
	)

Constructor from a char * (used by PM)

TMinuitMinimizer::~TMinuitMinimizer

(

)

Destructor (no operations)

TMinuitMinimizer::TMinuitMinimizer

(

const TMinuitMinimizer &

)

[private]

Copy constructor

---

Member Function Documentation

TMinuitMinimizer & TMinuitMinimizer::operator=

(

const TMinuitMinimizer &

rhs

)

[private]

Assignment operator

Definition at line 110 of file TMinuitMinimizer.cxx.

void TMinuitMinimizer::SetFunction

(

const ROOT::Math::IMultiGenFunction &

func

)

[virtual]

set the function to minimize

Implements ROOT::Math::Minimizer.

Definition at line 198 of file TMinuitMinimizer.cxx.

References Fcn(), fDim, fgFunc, fMinuit, func(), InitTMinuit(), TMinuit::mnexcm(), and TMinuit::SetFCN().

void TMinuitMinimizer::SetFunction

(

const ROOT::Math::IMultiGradFunction &

func

)

[virtual]

set the function to minimize

Reimplemented from ROOT::Math::Minimizer.

Definition at line 220 of file TMinuitMinimizer.cxx.

References FcnGrad(), fDim, fgFunc, fMinuit, func(), InitTMinuit(), TMinuit::mnexcm(), and TMinuit::SetFCN().

bool TMinuitMinimizer::SetVariable	(	unsigned int	ivar,
		const std::string &	name,
		double	val,
		double	step
	)			[virtual]

set free variable

Implements ROOT::Math::Minimizer.

Definition at line 262 of file TMinuitMinimizer.cxx.

References TMinuit::DefineParameter(), DoClear(), DoReleaseFixParameter(), Error, fgUsed, fMinuit, and fUsed.

bool TMinuitMinimizer::SetLimitedVariable	(	unsigned int	ivar,
		const std::string &	name,
		double	val,
		double	step,
		double	,
		double
	)			[virtual]

set upper/lower limited variable (override if minimizer supports them )

Reimplemented from ROOT::Math::Minimizer.

Definition at line 281 of file TMinuitMinimizer.cxx.

References TMinuit::DefineParameter(), DoClear(), DoReleaseFixParameter(), Error, fgUsed, fMinuit, and fUsed.

bool TMinuitMinimizer::SetFixedVariable	(	unsigned	int,
		const std::string &	,
		double
	)			[virtual]

set fixed variable (override if minimizer supports them )

Reimplemented from ROOT::Math::Minimizer.

Definition at line 324 of file TMinuitMinimizer.cxx.

References TMinuit::DefineParameter(), DoClear(), Error, fgUsed, TMinuit::FixParameter(), fMinuit, and fUsed.

bool TMinuitMinimizer::SetVariableValue	(	unsigned	int,
		double
	)			[virtual]

set the value of an existing variable

Reimplemented from ROOT::Math::Minimizer.

Definition at line 346 of file TMinuitMinimizer.cxx.

References Error, fMinuit, and TMinuit::mnexcm().

bool TMinuitMinimizer::Minimize

(

)

[virtual]

method to perform the minimization

Implements ROOT::Math::Minimizer.

Definition at line 375 of file TMinuitMinimizer.cxx.

References Error, ROOT::Math::Minimizer::ErrorDef(), fDim, fgUsed, fMinosRun, fMinuit, TMinuit::fNu, ROOT::Math::Minimizer::fStatus, fType, fUsed, Info, ROOT::Math::Minimizer::IsValidError(), ROOT::Minuit::kCombined, ROOT::Minuit::kMigrad, ROOT::Minuit::kMigradImproved, ROOT::Minuit::kScan, ROOT::Minuit::kSeek, ROOT::Minuit::kSimplex, ROOT::Math::Minimizer::MaxFunctionCalls(), TMinuit::mnexcm(), ROOT::Math::Minimizer::Precision(), ROOT::Math::Minimizer::PrintLevel(), RetrieveErrorMatrix(), RetrieveParams(), and ROOT::Math::Minimizer::Tolerance().

double TMinuitMinimizer::MinValue

(

)

const [virtual]

return minimum function value

Implements ROOT::Math::Minimizer.

Definition at line 552 of file TMinuitMinimizer.cxx.

References TMinuit::fAmin, fMinuit, and TMinuit::fUndefi.

double TMinuitMinimizer::Edm

(

)

const [virtual]

return expected distance reached from the minimum

Implements ROOT::Math::Minimizer.

Definition at line 562 of file TMinuitMinimizer.cxx.

References TMinuit::fAmin, TMinuit::fBigedm, TMinuit::fEDM, fMinuit, TMinuit::fUndefi, and TMinuit::fUp.

virtual const double* TMinuitMinimizer::X

(

)

const [inline, virtual]

return pointer to X values at the minimum

Implements ROOT::Math::Minimizer.

Definition at line 120 of file TMinuitMinimizer.h.

References fParams.

virtual const double* TMinuitMinimizer::MinGradient

(

)

const [inline, virtual]

return pointer to gradient values at the minimum

Implements ROOT::Math::Minimizer.

Definition at line 123 of file TMinuitMinimizer.h.

unsigned int TMinuitMinimizer::NCalls

(

)

const [virtual]

number of function calls to reach the minimum

Implements ROOT::Math::Minimizer.

Definition at line 546 of file TMinuitMinimizer.cxx.

References fMinuit, and TMinuit::fNfcn.

virtual unsigned int TMinuitMinimizer::NDim

(

)

const [inline, virtual]

this is <= Function().NDim() which is the total number of variables (free+ constrained ones)

Implements ROOT::Math::Minimizer.

Definition at line 130 of file TMinuitMinimizer.h.

References fDim.

unsigned int TMinuitMinimizer::NFree

(

)

const [virtual]

number of free variables (real dimension of the problem) this is <= Function().NDim() which is the total

Implements ROOT::Math::Minimizer.

Definition at line 571 of file TMinuitMinimizer.cxx.

References fMinuit, and TMinuit::fNpar.

Referenced by RetrieveErrorMatrix().

virtual bool TMinuitMinimizer::ProvidesError

(

)

const [inline, virtual]

minimizer provides error and error matrix

Implements ROOT::Math::Minimizer.

Definition at line 137 of file TMinuitMinimizer.h.

virtual const double* TMinuitMinimizer::Errors

(

)

const [inline, virtual]

return errors at the minimum

Implements ROOT::Math::Minimizer.

Definition at line 140 of file TMinuitMinimizer.h.

References fErrors.

virtual double TMinuitMinimizer::CovMatrix	(	unsigned int	i,
		unsigned int	j
	)			const [inline, virtual]

return covariance matrices elements if the variable is fixed the matrix is zero The ordering of the variables is the same as in errors

Implements ROOT::Math::Minimizer.

Definition at line 146 of file TMinuitMinimizer.h.

References fCovar, and fDim.

int TMinuitMinimizer::CovMatrixStatus

(

)

const [virtual]

return status of covariance matrix

Reimplemented from ROOT::Math::Minimizer.

Definition at line 578 of file TMinuitMinimizer.cxx.

References TMinuit::fAmin, TMinuit::fISW, fMinuit, and TMinuit::fUndefi.

double TMinuitMinimizer::GlobalCC

(

unsigned

int

)

const [virtual]

global correlation coefficient for variable i

Reimplemented from ROOT::Math::Minimizer.

Definition at line 591 of file TMinuitMinimizer.cxx.

References TMinuit::fGlobcc, fMinuit, TMinuit::fNiofex, and TMinuit::fNu.

bool TMinuitMinimizer::GetMinosError	(	unsigned int	i,
		double &	errLow,
		double &	errUp,
		int	= 0
	)			[virtual]

minos error for variable i, return false if Minos failed

Reimplemented from ROOT::Math::Minimizer.

Definition at line 603 of file TMinuitMinimizer.cxx.

References Error, ROOT::Math::Minimizer::ErrorDef(), fMinosRun, fMinuit, ROOT::Math::Minimizer::fStatus, ROOT::Math::Minimizer::MaxFunctionCalls(), TMinuit::mnerrs(), TMinuit::mnexcm(), ROOT::Math::Minimizer::Precision(), and ROOT::Math::Minimizer::PrintLevel().

bool TMinuitMinimizer::Hesse

(

)

[virtual]

perform a full calculation of the Hessian matrix for error calculation

Reimplemented from ROOT::Math::Minimizer.

Definition at line 825 of file TMinuitMinimizer.cxx.

References Error, ROOT::Math::Minimizer::ErrorDef(), fMinuit, ROOT::Math::Minimizer::fStatus, ROOT::Math::Minimizer::MaxFunctionCalls(), TMinuit::mnexcm(), ROOT::Math::Minimizer::Precision(), ROOT::Math::Minimizer::PrintLevel(), RetrieveErrorMatrix(), and RetrieveParams().

bool TMinuitMinimizer::Scan	(	unsigned int	i,
		unsigned int &	nstep,
		double *	x,
		double *	y,
		double	xmin = 0,
		double	xmax = 0
	)			[virtual]

scan a parameter i around the minimum. A minimization must have been done before, return false if it is not the case

Reimplemented from ROOT::Math::Minimizer.

Definition at line 753 of file TMinuitMinimizer.cxx.

References copy(), Error, fMinuit, TGraph::GetN(), TMinuit::GetPlot(), TGraph::GetX(), TGraph::GetY(), gr, int, min, TMinuit::mnexcm(), TMinuit::mnpout(), name, ROOT::Math::Minimizer::Precision(), ROOT::Math::Minimizer::PrintLevel(), and val.

bool TMinuitMinimizer::Contour	(	unsigned int	i,
		unsigned int	j,
		unsigned int &	npoints,
		double *	xi,
		double *	xj
	)			[virtual]

find the contour points (xi,xj) of the function for parameter i and j around the minimum The contour will be find for value of the function = Min + ErrorUp();

Reimplemented from ROOT::Math::Minimizer.

Definition at line 704 of file TMinuitMinimizer.cxx.

References Error, ROOT::Math::Minimizer::ErrorDef(), fMinuit, TMinuit::mncont(), TMinuit::mnexcm(), ROOT::Math::Minimizer::Precision(), ROOT::Math::Minimizer::PrintLevel(), and Warning().

void TMinuitMinimizer::PrintResults

(

)

[virtual]

print the result according to set level (implemented for TMinuit for mantaining Minuit-style printing)

return reference to the objective function virtual const ROOT::Math::IGenFunction & Function() const = 0;

Reimplemented from ROOT::Math::Minimizer.

Definition at line 692 of file TMinuitMinimizer.cxx.

References TMinuit::fAmin, fMinuit, TMinuit::mnprin(), and ROOT::Math::Minimizer::PrintLevel().

std::string TMinuitMinimizer::VariableName

(

unsigned int

ivar

)

const [virtual]

get name of variables (override if minimizer support storing of variable names)

return reference to the objective function virtual const ROOT::Math::IGenFunction & Function() const;

Reimplemented from ROOT::Math::Minimizer.

Definition at line 363 of file TMinuitMinimizer.cxx.

References TMinuit::fCpnam, fMinuit, and TMinuit::fNu.

int TMinuitMinimizer::VariableIndex

(

const std::string &

name

)

const [virtual]

get index of variable given a variable given a name return always -1 . (It is Not implemented)

Reimplemented from ROOT::Math::Minimizer.

Definition at line 369 of file TMinuitMinimizer.cxx.

References Error.

bool TMinuitMinimizer::UseStaticMinuit

(

bool

on = true

)

[static]

static function to switch on/off usage of static global TMinuit instance (gMinuit) By default it is used (i.e. is on). Method returns the previous state

Definition at line 117 of file TMinuitMinimizer.cxx.

References fgUseStaticMinuit.

Referenced by G__G__Minuit_218_0_31(), and G__setup_memfuncTMinuitMinimizer().

void TMinuitMinimizer::Fcn	(	int &	,
		double *	,
		double &	f,
		double *	,
		int
	)			[static, protected]

implementation of FCN for Minuit

Definition at line 243 of file TMinuitMinimizer.cxx.

References fgFunc.

Referenced by SetFunction().

void TMinuitMinimizer::FcnGrad	(	int &	,
		double *	g,
		double &	f,
		double *	,
		int
	)			[static, protected]

implementation of FCN for Minuit when user provided gradient is used

Definition at line 249 of file TMinuitMinimizer.cxx.

References fgFunc, and ROOT::Math::IGradientFunctionMultiDim::Gradient().

Referenced by SetFunction().

void TMinuitMinimizer::InitTMinuit

(

int

ndim

)

[protected]

initialize the TMinuit instance

Definition at line 124 of file TMinuitMinimizer.cxx.

References fDim, fgMinuit, fgUsed, fgUseStaticMinuit, TCollection::FindObject(), TMinuit::fMaxpar, fMinuit, TROOT::GetListOfSpecials(), TMinuit::GetNumPars(), gMinuit, gROOT, int, TMinuit::mnexcm(), ROOT::Math::Minimizer::PrintLevel(), and R__ASSERT.

Referenced by SetFunction(), and TMinuitMinimizer().

void TMinuitMinimizer::DoClear

(

)

[protected]

reset

Definition at line 656 of file TMinuitMinimizer.cxx.

References fgUsed, fMinuit, fUsed, TMinuit::mncler(), and TMinuit::mnrn15().

Referenced by SetFixedVariable(), SetLimitedVariable(), and SetVariable().

void TMinuitMinimizer::DoReleaseFixParameter

(

int

ivar

)

[protected]

release a parameter that is fixed when it is redefined

Definition at line 671 of file TMinuitMinimizer.cxx.

References TMinuit::fIpfix, fMinuit, TMinuit::fNpfix, TMinuit::GetNumFixedPars(), TMinuit::GetNumPars(), i, and TMinuit::Release().

Referenced by SetLimitedVariable(), and SetVariable().

void TMinuitMinimizer::RetrieveParams

(

)

[protected]

retrieve minimum parameters and errors from TMinuit

Definition at line 495 of file TMinuitMinimizer.cxx.

References fDim, fErrors, fMinuit, fParams, TMinuit::GetParameter(), and i.

Referenced by Hesse(), and Minimize().

void TMinuitMinimizer::RetrieveErrorMatrix

(

)

[protected]

retrieve error matrix from TMinuit

Definition at line 509 of file TMinuitMinimizer.cxx.

References fCovar, fDim, fMinuit, TMinuit::fNiofex, for(), i, j, l, m, TMinuit::mnemat(), and NFree().

Referenced by Hesse(), and Minimize().

TMinuitMinimizer& TMinuitMinimizer::operator=

(

const TMinuitMinimizer &

rhs

)

[private]

Assignment operator

virtual void TMinuitMinimizer::SetFunction

(

const ROOT::Math::IMultiGenFunction &

func

)

[virtual]

set the function to minimize

Implements ROOT::Math::Minimizer.

virtual void TMinuitMinimizer::SetFunction

(

const ROOT::Math::IMultiGradFunction &

func

)

[virtual]

set the function to minimize

Reimplemented from ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::SetVariable	(	unsigned int	ivar,
		const std::string &	name,
		double	val,
		double	step
	)			[virtual]

set free variable

Implements ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::SetLimitedVariable	(	unsigned int	ivar,
		const std::string &	name,
		double	val,
		double	step,
		double	,
		double
	)			[virtual]

set upper/lower limited variable (override if minimizer supports them )

Reimplemented from ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::SetFixedVariable	(	unsigned	int,
		const std::string &	,
		double
	)			[virtual]

set fixed variable (override if minimizer supports them )

Reimplemented from ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::SetVariableValue	(	unsigned	int,
		double
	)			[virtual]

set the value of an existing variable

Reimplemented from ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::Minimize

(

)

[virtual]

method to perform the minimization

Implements ROOT::Math::Minimizer.

virtual double TMinuitMinimizer::MinValue

(

)

const [virtual]

return minimum function value

Implements ROOT::Math::Minimizer.

virtual double TMinuitMinimizer::Edm

(

)

const [virtual]

return expected distance reached from the minimum

Implements ROOT::Math::Minimizer.

virtual const double* TMinuitMinimizer::X

(

)

const [inline, virtual]

return pointer to X values at the minimum

Implements ROOT::Math::Minimizer.

Definition at line 120 of file TMinuitMinimizer.h.

References fParams.

virtual const double* TMinuitMinimizer::MinGradient

(

)

const [inline, virtual]

return pointer to gradient values at the minimum

Implements ROOT::Math::Minimizer.

Definition at line 123 of file TMinuitMinimizer.h.

virtual unsigned int TMinuitMinimizer::NCalls

(

)

const [virtual]

number of function calls to reach the minimum

Implements ROOT::Math::Minimizer.

virtual unsigned int TMinuitMinimizer::NDim

(

)

const [inline, virtual]

this is <= Function().NDim() which is the total number of variables (free+ constrained ones)

Implements ROOT::Math::Minimizer.

Definition at line 130 of file TMinuitMinimizer.h.

References fDim.

virtual unsigned int TMinuitMinimizer::NFree

(

)

const [virtual]

number of free variables (real dimension of the problem) this is <= Function().NDim() which is the total

Implements ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::ProvidesError

(

)

const [inline, virtual]

minimizer provides error and error matrix

Implements ROOT::Math::Minimizer.

Definition at line 137 of file TMinuitMinimizer.h.

virtual const double* TMinuitMinimizer::Errors

(

)

const [inline, virtual]

return errors at the minimum

Implements ROOT::Math::Minimizer.

Definition at line 140 of file TMinuitMinimizer.h.

References fErrors.

virtual double TMinuitMinimizer::CovMatrix	(	unsigned int	i,
		unsigned int	j
	)			const [inline, virtual]

return covariance matrices elements if the variable is fixed the matrix is zero The ordering of the variables is the same as in errors

Implements ROOT::Math::Minimizer.

Definition at line 146 of file TMinuitMinimizer.h.

References fCovar, and fDim.

virtual int TMinuitMinimizer::CovMatrixStatus

(

)

const [virtual]

return status of covariance matrix

Reimplemented from ROOT::Math::Minimizer.

virtual double TMinuitMinimizer::GlobalCC

(

unsigned

int

)

const [virtual]

global correlation coefficient for variable i

Reimplemented from ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::GetMinosError	(	unsigned int	i,
		double &	errLow,
		double &	errUp,
		int	= 0
	)			[virtual]

minos error for variable i, return false if Minos failed

Reimplemented from ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::Hesse

(

)

[virtual]

perform a full calculation of the Hessian matrix for error calculation

Reimplemented from ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::Scan	(	unsigned int	i,
		unsigned int &	nstep,
		double *	x,
		double *	y,
		double	xmin = 0,
		double	xmax = 0
	)			[virtual]

scan a parameter i around the minimum. A minimization must have been done before, return false if it is not the case

Reimplemented from ROOT::Math::Minimizer.

virtual bool TMinuitMinimizer::Contour	(	unsigned int	i,
		unsigned int	j,
		unsigned int &	npoints,
		double *	xi,
		double *	xj
	)			[virtual]

find the contour points (xi,xj) of the function for parameter i and j around the minimum The contour will be find for value of the function = Min + ErrorUp();

Reimplemented from ROOT::Math::Minimizer.

virtual void TMinuitMinimizer::PrintResults

(

)

[virtual]

print the result according to set level (implemented for TMinuit for mantaining Minuit-style printing)

return reference to the objective function virtual const ROOT::Math::IGenFunction & Function() const = 0;

Reimplemented from ROOT::Math::Minimizer.

virtual std::string TMinuitMinimizer::VariableName

(

unsigned int

ivar

)

const [virtual]

get name of variables (override if minimizer support storing of variable names)

return reference to the objective function virtual const ROOT::Math::IGenFunction & Function() const;

Reimplemented from ROOT::Math::Minimizer.

virtual int TMinuitMinimizer::VariableIndex

(

const std::string &

name

)

const [virtual]

get index of variable given a variable given a name return always -1 . (It is Not implemented)

Reimplemented from ROOT::Math::Minimizer.

static bool TMinuitMinimizer::UseStaticMinuit

(

bool

on = true

)

[static]

static function to switch on/off usage of static global TMinuit instance (gMinuit) By default it is used (i.e. is on). Method returns the previous state

static void TMinuitMinimizer::Fcn	(	int &	,
		double *	,
		double &	f,
		double *	,
		int
	)			[static, protected]

implementation of FCN for Minuit

static void TMinuitMinimizer::FcnGrad	(	int &	,
		double *	g,
		double &	f,
		double *	,
		int
	)			[static, protected]

implementation of FCN for Minuit when user provided gradient is used

void TMinuitMinimizer::InitTMinuit

(

int

ndim

)

[protected]

initialize the TMinuit instance

void TMinuitMinimizer::DoClear

(

)

[protected]

reset

void TMinuitMinimizer::DoReleaseFixParameter

(

int

ivar

)

[protected]

release a parameter that is fixed when it is redefined

void TMinuitMinimizer::RetrieveParams

(

)

[protected]

retrieve minimum parameters and errors from TMinuit

void TMinuitMinimizer::RetrieveErrorMatrix

(

)

[protected]

retrieve error matrix from TMinuit

---

Member Data Documentation

bool TMinuitMinimizer::fUsed [private]

Definition at line 218 of file TMinuitMinimizer.h.

Referenced by DoClear(), Minimize(), SetFixedVariable(), SetLimitedVariable(), and SetVariable().

bool TMinuitMinimizer::fMinosRun [private]

Definition at line 219 of file TMinuitMinimizer.h.

Referenced by GetMinosError(), and Minimize().

unsigned int TMinuitMinimizer::fDim [private]

Definition at line 220 of file TMinuitMinimizer.h.

Referenced by CovMatrix(), InitTMinuit(), Minimize(), NDim(), RetrieveErrorMatrix(), RetrieveParams(), SetFunction(), and TMinuitMinimizer().

unsigned int TMinuitMinimizer::fStrategy [private]

Reimplemented from ROOT::Math::Minimizer.

Definition at line 221 of file TMinuitMinimizer.h.

std::vector<double> TMinuitMinimizer::fParams [private]

Definition at line 222 of file TMinuitMinimizer.h.

Referenced by RetrieveParams(), and X().

std::vector<double> TMinuitMinimizer::fErrors [private]

Definition at line 223 of file TMinuitMinimizer.h.

Referenced by Errors(), and RetrieveParams().

std::vector<double> TMinuitMinimizer::fCovar [private]

Definition at line 224 of file TMinuitMinimizer.h.

Referenced by CovMatrix(), and RetrieveErrorMatrix().

ROOT::Minuit::EMinimizerType TMinuitMinimizer::fType [private]

Definition at line 226 of file TMinuitMinimizer.h.

Referenced by Minimize(), and TMinuitMinimizer().

TMinuit* TMinuitMinimizer::fMinuit [private]

Definition at line 227 of file TMinuitMinimizer.h.

Referenced by Contour(), CovMatrixStatus(), DoClear(), DoReleaseFixParameter(), Edm(), GetMinosError(), GlobalCC(), Hesse(), InitTMinuit(), Minimize(), MinValue(), NCalls(), NFree(), PrintResults(), RetrieveErrorMatrix(), RetrieveParams(), Scan(), SetFixedVariable(), SetFunction(), SetLimitedVariable(), SetVariable(), SetVariableValue(), VariableName(), and ~TMinuitMinimizer().

ROOT::Math::IMultiGenFunction * TMinuitMinimizer::fgFunc [static, private]

Definition at line 231 of file TMinuitMinimizer.h.

Referenced by Fcn(), FcnGrad(), and SetFunction().

TMinuit * TMinuitMinimizer::fgMinuit [static, private]

Definition at line 233 of file TMinuitMinimizer.h.

Referenced by InitTMinuit(), and ~TMinuitMinimizer().

bool TMinuitMinimizer::fgUsed [static, private]

Definition at line 235 of file TMinuitMinimizer.h.

Referenced by DoClear(), InitTMinuit(), Minimize(), SetFixedVariable(), SetLimitedVariable(), and SetVariable().

bool TMinuitMinimizer::fgUseStaticMinuit [static, private]

Definition at line 236 of file TMinuitMinimizer.h.

Referenced by InitTMinuit(), UseStaticMinuit(), and ~TMinuitMinimizer().

std::vector<double> TMinuitMinimizer::fParams [private]

Definition at line 222 of file TMinuitMinimizer.h.

std::vector<double> TMinuitMinimizer::fErrors [private]

Definition at line 223 of file TMinuitMinimizer.h.

std::vector<double> TMinuitMinimizer::fCovar [private]

Definition at line 224 of file TMinuitMinimizer.h.

TMinuit* TMinuitMinimizer::fMinuit [private]

Definition at line 227 of file TMinuitMinimizer.h.

ROOT::Math::IMultiGenFunction* TMinuitMinimizer::fgFunc [static, private]

Definition at line 231 of file TMinuitMinimizer.h.

TMinuit* TMinuitMinimizer::fgMinuit [static, private]

Definition at line 233 of file TMinuitMinimizer.h.

---

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

• include/TMinuitMinimizer.h
• math/minuit/inc/TMinuitMinimizer.h
• math/minuit/src/TMinuitMinimizer.cxx

---