00001 /***************************************************************************** 00002 * Project: RooFit * 00003 * Package: RooFitCore * 00004 * File: $Id: RooBrentRootFinder.h,v 1.6 2007/05/11 09:11:30 verkerke Exp $ 00005 * Authors: * 00006 * WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu * 00007 * DK, David Kirkby, UC Irvine, dkirkby@uci.edu * 00008 * * 00009 * Copyright (c) 2000-2005, Regents of the University of California * 00010 * and Stanford University. All rights reserved. * 00011 * * 00012 * Redistribution and use in source and binary forms, * 00013 * with or without modification, are permitted according to the terms * 00014 * listed in LICENSE (http://roofit.sourceforge.net/license.txt) * 00015 *****************************************************************************/ 00016 #ifndef ROO_BRENT_ROOT_FINDER 00017 #define ROO_BRENT_ROOT_FINDER 00018 00019 #include "RooAbsRootFinder.h" 00020 00021 class RooBrentRootFinder : public RooAbsRootFinder { 00022 public: 00023 RooBrentRootFinder(const RooAbsFunc& function); 00024 inline virtual ~RooBrentRootFinder() { } 00025 00026 virtual Bool_t findRoot(Double_t &result, Double_t xlo, Double_t xhi, Double_t value= 0) const; 00027 void setTol(Double_t tol) { 00028 // Set convergence tolerance parameter 00029 _tol = tol ; 00030 } 00031 00032 protected: 00033 enum { MaxIterations = 512 }; 00034 00035 Double_t _tol ; 00036 00037 ClassDef(RooBrentRootFinder,0) // Abstract interface for 1-dim real-valued function root finders 00038 }; 00039 00040 #endif
1.5.1