00001 /***************************************************************************** 00002 * Project: RooFit * 00003 * Package: RooFitCore * 00004 * File: $Id: RooScaledFunc.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_SCALED_FUNC 00017 #define ROO_SCALED_FUNC 00018 00019 #include "RooAbsFunc.h" 00020 00021 class RooScaledFunc : public RooAbsFunc { 00022 public: 00023 inline RooScaledFunc(const RooAbsFunc &func, Double_t scaleFactor) : 00024 RooAbsFunc(func.getDimension()), _func(&func), _scaleFactor(scaleFactor) { } 00025 inline virtual ~RooScaledFunc() { } 00026 00027 inline virtual Double_t operator()(const Double_t xvector[]) const { 00028 return _scaleFactor*(*_func)(xvector); 00029 } 00030 inline virtual Double_t getMinLimit(UInt_t index) const { return _func->getMinLimit(index); } 00031 inline virtual Double_t getMaxLimit(UInt_t index) const { return _func->getMaxLimit(index); } 00032 00033 virtual std::list<Double_t>* plotSamplingHint(RooAbsRealLValue& obs, Double_t xlo, Double_t xhi) const { 00034 return _func->plotSamplingHint(obs,xlo,xhi) ; 00035 } 00036 00037 protected: 00038 const RooAbsFunc *_func; 00039 Double_t _scaleFactor; 00040 00041 ClassDef(RooScaledFunc,0) // Function binding applying scaling to another function binding 00042 }; 00043 00044 #endif 00045
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