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RooBrentRootFinder.h
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1 /*****************************************************************************
2  * Project: RooFit *
3  * Package: RooFitCore *
4  * File: $Id: RooBrentRootFinder.h,v 1.6 2007/05/11 09:11:30 verkerke Exp $
5  * Authors: *
6  * WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu *
7  * DK, David Kirkby, UC Irvine, dkirkby@uci.edu *
8  * *
9  * Copyright (c) 2000-2005, Regents of the University of California *
10  * and Stanford University. All rights reserved. *
11  * *
12  * Redistribution and use in source and binary forms, *
13  * with or without modification, are permitted according to the terms *
14  * listed in LICENSE (http://roofit.sourceforge.net/license.txt) *
15  *****************************************************************************/
16 #ifndef ROO_BRENT_ROOT_FINDER
17 #define ROO_BRENT_ROOT_FINDER
18 
19 #include "RooAbsRootFinder.h"
20 
22 public:
23  RooBrentRootFinder(const RooAbsFunc& function);
24  inline virtual ~RooBrentRootFinder() { }
25 
26  virtual Bool_t findRoot(Double_t &result, Double_t xlo, Double_t xhi, Double_t value= 0) const;
27  void setTol(Double_t tol) {
28  // Set convergence tolerance parameter
29  _tol = tol ;
30  }
31 
32 protected:
33  enum { MaxIterations = 512 };
34 
35  Double_t _tol ;
36 
37  ClassDef(RooBrentRootFinder,0) // Abstract interface for 1-dim real-valued function root finders
38 };
39 
40 #endif
bool
RooAbsFunc
Definition: RooAbsFunc.h:23
RooBrentRootFinder::setTol
void setTol(Double_t tol)
Definition: RooBrentRootFinder.h:41
RooBrentRootFinder::~RooBrentRootFinder
virtual ~RooBrentRootFinder()
Definition: RooBrentRootFinder.h:38
RooBrentRootFinder
Definition: RooBrentRootFinder.h:21
RooAbsRootFinder.h
RooBrentRootFinder::_tol
Double_t _tol
Definition: RooBrentRootFinder.h:49
RooBrentRootFinder::RooBrentRootFinder
RooBrentRootFinder(const RooAbsFunc &function)
Constructor taking function binding as input.
Definition: RooBrentRootFinder.cxx:44
RooBrentRootFinder::MaxIterations
@ MaxIterations
Definition: RooBrentRootFinder.h:47
Double_t
double Double_t
Definition: RtypesCore.h:59
ClassDef
#define ClassDef(name, id)
Definition: Rtypes.h:325
RooAbsRootFinder
Definition: RooAbsRootFinder.h:23
RooBrentRootFinder::findRoot
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.
Definition: RooBrentRootFinder.cxx:58