ROOT::Math::GSLRootFinder Class Reference

Base class for GSL Root-Finding algorithms for one dimensional functions which do not use function derivatives.

For finding the roots users should not use this class directly but instantiate the derived classes, for example ROOT::Math::Roots::Brent for using the Brent algorithm. All the classes defining the alhorithms are defined in the header Math/RootFinderAlgorithm.h They possible types implementing root bracketing algorithms which they do not require function derivatives are:

• ROOT::Math::Roots::Bisection
• ROOT::Math::Roots::FalsePos
• ROOT::Math::Roots::Brent

See also the specific classes for the documentation. See the GSL online manual for information on the GSL Root-Finding algorithms

Definition at line 79 of file GSLRootFinder.h.

Public Types
typedef double(*	GSLFuncPointer) (double, void *)

Public Member Functions
	GSLRootFinder ()
virtual	~GSLRootFinder ()
int	Iterate ()
	This method is implemented only by the GSLRootFinder and GSLRootFinderDeriv classes and will return an error if it's not one of them. More...
int	Iterations () const
	Return number of iterations. More...
const char *	Name () const
	double GSLRootFinder::XLower() const { return fXlow; } More...
double	Root () const
	Returns the previously calculated root. More...
bool	SetFunction (const IGenFunction &f, double xlow, double xup)
	Sets the function for the rest of the algorithms. More...
bool	SetFunction (GSLFuncPointer f, void *params, double xlow, double xup)
bool	Solve (int maxIter=100, double absTol=1E-8, double relTol=1E-10)
	Find the root. More...
int	Status () const
	Return the status of last root finding. More...
Public Member Functions inherited from ROOT::Math::IRootFinderMethod
	IRootFinderMethod ()
	Default Constructor. More...
virtual	~IRootFinderMethod ()
	Default Destructor. More...
virtual bool	SetFunction (const ROOT::Math::IGradFunction &, double)
	Sets the function for algorithms using derivatives. More...

Protected Member Functions
void	FreeSolver ()
void	SetSolver (GSLRootFSolver *s)

Private Member Functions
	GSLRootFinder (const GSLRootFinder &)
GSLRootFinder &	operator= (const GSLRootFinder &)

Private Attributes
GSLFunctionWrapper *	fFunction
int	fIter
double	fRoot
GSLRootFSolver *	fS
int	fStatus
bool	fValidInterval
double	fXlow
double	fXup

#include <Math/GSLRootFinder.h>

Inheritance diagram for ROOT::Math::GSLRootFinder:

Member Typedef Documentation

GSLFuncPointer

typedef double( * ROOT::Math::GSLRootFinder::GSLFuncPointer) (double, void *)

Definition at line 102 of file GSLRootFinder.h.

Constructor & Destructor Documentation

GSLRootFinder() [1/2]

ROOT::Math::GSLRootFinder::GSLRootFinder

(

)

Definition at line 49 of file GSLRootFinder.cxx.

~GSLRootFinder()

ROOT::Math::GSLRootFinder::~GSLRootFinder ( )

virtual

Definition at line 59 of file GSLRootFinder.cxx.

GSLRootFinder() [2/2]

ROOT::Math::GSLRootFinder::GSLRootFinder ( const GSLRootFinder &  )

private

Definition at line 65 of file GSLRootFinder.cxx.

Member Function Documentation

FreeSolver()

void ROOT::Math::GSLRootFinder::FreeSolver ( )

protected

Definition at line 113 of file GSLRootFinder.cxx.

Iterate()

int ROOT::Math::GSLRootFinder::Iterate ( )

virtual

This method is implemented only by the GSLRootFinder and GSLRootFinderDeriv classes and will return an error if it's not one of them.

Reimplemented from ROOT::Math::IRootFinderMethod.

Definition at line 118 of file GSLRootFinder.cxx.

Iterations()

int ROOT::Math::GSLRootFinder::Iterations ( ) const

inlinevirtual

Return number of iterations.

Reimplemented from ROOT::Math::IRootFinderMethod.

Definition at line 120 of file GSLRootFinder.h.

Name()

const char * ROOT::Math::GSLRootFinder::Name ( ) const

virtual

double GSLRootFinder::XLower() const { return fXlow; }

double GSLRootFinder::XUpper() const { return fXup; }

Implements ROOT::Math::IRootFinderMethod.

Definition at line 159 of file GSLRootFinder.cxx.

operator=()

GSLRootFinder & ROOT::Math::GSLRootFinder::operator= ( const GSLRootFinder &  rhs )

private

Definition at line 69 of file GSLRootFinder.cxx.

Root()

double ROOT::Math::GSLRootFinder::Root ( ) const

virtual

Returns the previously calculated root.

Implements ROOT::Math::IRootFinderMethod.

Definition at line 146 of file GSLRootFinder.cxx.

SetFunction() [1/2]

bool ROOT::Math::GSLRootFinder::SetFunction ( const IGenFunction &  , double  , double    )

virtual

Sets the function for the rest of the algorithms.

The parameters set the interval where the root has to be calculated.

Reimplemented from ROOT::Math::IRootFinderMethod.

Definition at line 93 of file GSLRootFinder.cxx.

SetFunction() [2/2]

bool ROOT::Math::GSLRootFinder::SetFunction	(	GSLFuncPointer	f,
		void *	params,
		double	xlow,
		double	xup
	)

Definition at line 77 of file GSLRootFinder.cxx.

SetSolver()

void ROOT::Math::GSLRootFinder::SetSolver ( GSLRootFSolver *  s )

protected

Definition at line 108 of file GSLRootFinder.cxx.

Solve()

bool ROOT::Math::GSLRootFinder::Solve ( int  maxIter = 100, double  absTol = 1E-8, double  relTol = 1E-10  )

virtual

Find the root.

Implements ROOT::Math::IRootFinderMethod.

Definition at line 164 of file GSLRootFinder.cxx.

Status()

int ROOT::Math::GSLRootFinder::Status ( ) const

inlinevirtual

Return the status of last root finding.

Implements ROOT::Math::IRootFinderMethod.

Definition at line 125 of file GSLRootFinder.h.

Member Data Documentation

fFunction

GSLFunctionWrapper* ROOT::Math::GSLRootFinder::fFunction

private

Definition at line 139 of file GSLRootFinder.h.

fIter

int ROOT::Math::GSLRootFinder::fIter

private

Definition at line 145 of file GSLRootFinder.h.

fRoot

double ROOT::Math::GSLRootFinder::fRoot

private

Definition at line 142 of file GSLRootFinder.h.

fS

GSLRootFSolver* ROOT::Math::GSLRootFinder::fS

private

Definition at line 140 of file GSLRootFinder.h.

fStatus

int ROOT::Math::GSLRootFinder::fStatus

private

Definition at line 146 of file GSLRootFinder.h.

fValidInterval

bool ROOT::Math::GSLRootFinder::fValidInterval

private

Definition at line 147 of file GSLRootFinder.h.

fXlow

double ROOT::Math::GSLRootFinder::fXlow

private

Definition at line 143 of file GSLRootFinder.h.

fXup

double ROOT::Math::GSLRootFinder::fXup

private

Definition at line 144 of file GSLRootFinder.h.

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

• math/mathmore/inc/Math/GSLRootFinder.h
• math/mathmore/src/GSLRootFinder.cxx