class ROOT::Math::GSLRootFinder: public ROOT::Math::IRootFinderMethod


     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:
     <ul>
         <li>ROOT::Math::Roots::Bisection
         <li>ROOT::Math::Roots::FalsePos
         <li>ROOT::Math::Roots::Brent
     </ul>

     See also the specific  classes for the documentation.
     See the GSL <A HREF="http://www.gnu.org/software/gsl/manual/html_node/Root-Bracketing-Algorithms.html"> online manual</A> for
     information on the GSL Root-Finding algorithms

     @ingroup RootFinders

Function Members (Methods)

public:

virtual	~GSLRootFinder()
ROOT::Math::GSLRootFinder	GSLRootFinder()
virtual int	Iterate()
virtual int	Iterations() const
virtual const char*	Name() const
virtual double	Root() const
virtual bool	SetFunction(const ROOT::Math::IGradFunction&, double)
virtual bool	SetFunction(const ROOT::Math::IGenFunction& f, double xlow, double xup)
bool	SetFunction(ROOT::Math::GSLRootFinder::GSLFuncPointer f, void* params, double xlow, double xup)
virtual bool	Solve(int maxIter = 100, double absTol = 1E-8, double relTol = 1E-10)
virtual int	Status() const

protected:

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

private:

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

Data Members

private:

ROOT::Math::GSLFunctionWrapper*	fFunction
int	fIter
double	fRoot
ROOT::Math::GSLRootFSolver*	fS
int	fStatus
bool	fValidInterval
double	fXlow
double	fXup

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

GSLRootFinder()

virtual ~GSLRootFinder()

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

 usually copying is non trivial, so we make this unaccessible

bool SetFunction(const ROOT::Math::IGradFunction& , double )

bool SetFunction(const ROOT::Math::IGenFunction& f, double xlow, double xup)

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

int Iterate()

 iterate to find ROOTS return GSL_CONTINUE if iteration was succesfull or another error

double Root() const

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

double XLower() const;
double XUpper() const;
 Find the root

int Iterations() const

 Return number of iterations

int Status() const

 Return the status of last root finding

{ return fStatus; }

const char * Name() const

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

void FreeSolver()