Steffenson method, providing the fastes convergence.

See the GSL manual for more information

Definition at line 178 of file RootFinderAlgorithms.h.

Public Member Functions
	Steffenson ()

virtual	~Steffenson ()

Public Member Functions inherited from ROOT::Math::GSLRootFinderDeriv
	GSLRootFinderDeriv ()

virtual	~GSLRootFinderDeriv ()

int	Iterate ()
	iterate (return GSL_SUCCESS in case of successful iteration) More...

int	Iterations () const
	Return number of iterations. More...

const char *	Name () const
	Return name of root finder algorithm. More...

double	Root () const
	Returns the previously calculated root. More...

bool	SetFunction (const IGradFunction &f, double xstart)
	Sets the function for algorithms using derivatives. More...

virtual bool	SetFunction (const ROOT::Math::IGenFunction &, double, double)
	Sets the function for the rest of the algorithms. More...

virtual bool	SetFunction (const ROOT::Math::IGradFunction &, double)
	Sets the function for algorithms using derivatives. More...

bool	SetFunction (GSLFuncPointer f, GSLFuncPointer df, GSLFdFPointer fdf, void *p, double Root)

bool	Solve (int maxIter=100, double absTol=1E-8, double relTol=1E-10)
	Find the root (return false if failed) 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 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...

virtual int	Iterations () const
	Return number of iterations used to find the root Must be implemented by derived classes. More...

virtual const char *	Name () const =0
	Return name of root finder algorithm. More...

virtual double	Root () const =0
	Returns the previously calculated root. More...

virtual bool	SetFunction (const ROOT::Math::IGenFunction &, double, double)
	Sets the function for the rest of the algorithms. More...

virtual bool	SetFunction (const ROOT::Math::IGradFunction &, double)
	Sets the function for algorithms using derivatives. More...

virtual bool	Solve (int maxIter=100, double absTol=1E-8, double relTol=1E-10)=0
	Stimates the root for the function. More...

virtual int	Status () const =0
	Returns the status of the previous estimate. More...

Private Member Functions
	Steffenson (const Steffenson &)

Steffenson &	operator= (const Steffenson &)

Additional Inherited Members
Public Types inherited from ROOT::Math::GSLRootFinderDeriv
typedef void(*	GSLFdFPointer) (double, void , double , double *)

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

Protected Member Functions inherited from ROOT::Math::GSLRootFinderDeriv
void	FreeSolver ()

void	SetSolver (GSLRootFdFSolver *s)