class RooBrentRootFinder: public RooAbsRootFinder

Implement the abstract 1-dimensional root finding interface using the Brent-Decker method. This implementation is based on the one in the GNU scientific library (v0.99).

Function Members (Methods)

public:

	RooBrentRootFinder(const RooAbsFunc& function)
	RooBrentRootFinder(const RooBrentRootFinder&)
virtual	~RooBrentRootFinder()
static TClass*	Class()
virtual Bool_t	findRoot(Double_t& result, Double_t xlo, Double_t xhi, Double_t value = 0) const
virtual TClass*	IsA() const
void	setTol(Double_t tol)
virtual void	ShowMembers(TMemberInspector& insp, char* parent)
virtual void	Streamer(TBuffer& b)
void	StreamerNVirtual(TBuffer& b)

Data Members

public:

enum {	MaxIterations
};

protected:

const RooAbsFunc*	RooAbsRootFinder::_function	Pointer to input function
Double_t	_tol
Bool_t	RooAbsRootFinder::_valid	True if current state is valid

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

RooBrentRootFinder(const RooAbsFunc& function)

 Constructor taking function binding as input

Bool_t findRoot(Double_t& result, Double_t xlo, Double_t xhi, Double_t value = 0) const

 Do the root finding using the Brent-Decker method. Returns a boolean status and
 loads 'result' with our best guess at the root if true.
 Prints a warning if the initial interval does not bracket a single
 root or if the root is not found after a fixed number of iterations.

RooBrentRootFinder(const RooAbsFunc& function)

virtual ~RooBrentRootFinder()

{ }

void setTol(Double_t tol)

 Set convergence tolerance parameter