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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
22public:
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
32protected:
33 enum { MaxIterations = 512 };
34
36
37 ClassDef(RooBrentRootFinder,0) // Abstract interface for 1-dim real-valued function root finders
38};
39
40#endif
bool Bool_t
Definition: RtypesCore.h:63
double Double_t
Definition: RtypesCore.h:59
#define ClassDef(name, id)
Definition: Rtypes.h:325
Abstract interface for evaluating a real-valued function of one real variable and performing numerica...
Definition: RooAbsFunc.h:27
RooAbsRootFinder is the abstract interface for finding roots of real-valued 1-dimensional function th...
Implement the abstract 1-dimensional root finding interface using the Brent-Decker method.
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.
void setTol(Double_t tol)
RooBrentRootFinder(const RooAbsFunc &function)
Constructor taking function binding as input.