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RooParamBinning.h
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1 /*****************************************************************************
2  * Project: RooFit *
3  * Package: RooFitCore *
4  * File: $Id$
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_PARAM_BINNING
17 #define ROO_PARAM_BINNING
18 
19 #include "Rtypes.h"
20 #include "RooAbsBinning.h"
21 #include "RooRealVar.h"
22 #include "RooListProxy.h"
23 class TIterator ;
24 
25 class RooParamBinning : public RooAbsBinning {
26 public:
27 
28  RooParamBinning(const char* name=0) ;
29  RooParamBinning(RooAbsReal& xlo, RooAbsReal& xhi, Int_t nBins, const char* name=0) ;
30  RooParamBinning(const RooParamBinning& other, const char* name=0) ;
31  RooAbsBinning* clone(const char* name=0) const { return new RooParamBinning(*this,name?name:GetName()) ; }
32  virtual ~RooParamBinning() ;
33 
34  virtual void setRange(Double_t xlo, Double_t xhi) ;
35 
36  virtual Int_t numBoundaries() const { return _nbins + 1 ; }
37  virtual Int_t binNumber(Double_t x) const ;
38 
39  virtual Double_t lowBound() const { return xlo()->getVal() ; }
40  virtual Double_t highBound() const { return xhi()->getVal() ; }
41 
42  virtual Double_t binCenter(Int_t bin) const ;
43  virtual Double_t binWidth(Int_t bin) const ;
44  virtual Double_t binLow(Int_t bin) const ;
45  virtual Double_t binHigh(Int_t bin) const ;
46 
47  virtual Double_t averageBinWidth() const { return _binw ; }
48  virtual Double_t* array() const ;
49 
50  void printMultiline(std::ostream &os, Int_t content, Bool_t verbose=kFALSE, TString indent="") const ;
51 
52  virtual void insertHook(RooAbsRealLValue&) const ;
53  virtual void removeHook(RooAbsRealLValue&) const ;
54 
55  virtual Bool_t isShareable() const { return kFALSE ; } // parameterized binning cannot be shared across instances
56  virtual Bool_t isParameterized() const { return kTRUE ; } // binning is parameterized, range will need special handling in integration
57  virtual RooAbsReal* lowBoundFunc() const { return xlo() ; }
58  virtual RooAbsReal* highBoundFunc() const { return xhi() ; }
59 
60 protected:
61 
62  mutable Double_t* _array ; //! do not persist
63  mutable RooAbsReal* _xlo ; //!
64  mutable RooAbsReal* _xhi ; //!
65  Int_t _nbins ;
66  Double_t _binw ;
67  mutable RooListProxy* _lp ; //
68  mutable RooAbsArg* _owner ; //
69 
70  RooAbsReal* xlo() const { return _lp ? ((RooAbsReal*)_lp->at(0)) : _xlo ; }
71  RooAbsReal* xhi() const { return _lp ? ((RooAbsReal*)_lp->at(1)) : _xhi ; }
72 
73  ClassDef(RooParamBinning,2) // Binning specification with ranges parameterized by external RooAbsReal functions
74 };
75 
76 #endif