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Reference Guide
List of all members | Public Member Functions | Protected Types | Protected Attributes | List of all members
RooBrentRootFinder Class Reference

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).

Definition at line 21 of file RooBrentRootFinder.h.

Public Member Functions

 RooBrentRootFinder (const RooAbsFunc &function)
 Constructor taking function binding as input. More...
virtual ~RooBrentRootFinder ()
virtual 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. More...
void setTol (Double_t tol)
- Public Member Functions inherited from RooAbsRootFinder
 RooAbsRootFinder (const RooAbsFunc &function)
 Constructor take function binding as argument. More...
virtual ~RooAbsRootFinder ()

Protected Types

enum  { MaxIterations = 512 }

Protected Attributes

Double_t _tol
- Protected Attributes inherited from RooAbsRootFinder
const RooAbsFunc_function
Bool_t _valid

#include <RooBrentRootFinder.h>

Inheritance diagram for RooBrentRootFinder:

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Definition at line 33 of file RooBrentRootFinder.h.

Constructor & Destructor Documentation

◆ RooBrentRootFinder()

RooBrentRootFinder::RooBrentRootFinder ( const RooAbsFunc function)

Constructor taking function binding as input.

Definition at line 45 of file RooBrentRootFinder.cxx.

◆ ~RooBrentRootFinder()

virtual RooBrentRootFinder::~RooBrentRootFinder ( )

Definition at line 24 of file RooBrentRootFinder.h.

Member Function Documentation

◆ findRoot()

Bool_t RooBrentRootFinder::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.

Implements RooAbsRootFinder.

Definition at line 59 of file RooBrentRootFinder.cxx.

◆ setTol()

void RooBrentRootFinder::setTol ( Double_t  tol)

Definition at line 27 of file RooBrentRootFinder.h.

Member Data Documentation

◆ _tol

Double_t RooBrentRootFinder::_tol

Definition at line 35 of file RooBrentRootFinder.h.

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