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RooMCStudy.h
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1 /*****************************************************************************
2  * Project: RooFit *
3  * Package: RooFitCore *
4  * File: $Id: RooMCStudy.h,v 1.18 2007/05/11 10:14:56 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_MC_STUDY
17 #define ROO_MC_STUDY
18 
19 #include "TList.h"
20 #include "TNamed.h"
21 #include "RooArgSet.h"
22 #include <list>
23 class RooAbsPdf;
24 class RooDataSet ;
25 class RooAbsData ;
26 class RooAbsGenContext ;
27 class RooFitResult ;
28 class RooPlot ;
29 class RooRealVar ;
30 class RooAbsMCStudyModule ;
31 
32 class RooMCStudy : public TNamed {
33 public:
34 
35  RooMCStudy(const RooAbsPdf& model, const RooArgSet& observables,
36  const RooCmdArg& arg1=RooCmdArg::none(), const RooCmdArg& arg2=RooCmdArg::none(),
37  const RooCmdArg& arg3=RooCmdArg::none(), const RooCmdArg& arg4=RooCmdArg::none(), const RooCmdArg& arg5=RooCmdArg::none(),
38  const RooCmdArg& arg6=RooCmdArg::none(), const RooCmdArg& arg7=RooCmdArg::none(), const RooCmdArg& arg8=RooCmdArg::none()) ;
39 
40  RooMCStudy(const RooAbsPdf& genModel, const RooAbsPdf& fitModel,
41  const RooArgSet& dependents, const char* genOptions="",
42  const char* fitOptions="", const RooDataSet* genProtoData=0,
43  const RooArgSet& projDeps=RooArgSet()) ;
44  virtual ~RooMCStudy() ;
45 
46  // Method to add study modules
47  void addModule(RooAbsMCStudyModule& module) ;
48 
49 
50  // Run methods
51  Bool_t generateAndFit(Int_t nSamples, Int_t nEvtPerSample=0, Bool_t keepGenData=kFALSE, const char* asciiFilePat=0) ;
52  Bool_t generate(Int_t nSamples, Int_t nEvtPerSample=0, Bool_t keepGenData=kFALSE, const char* asciiFilePat=0) ;
53  Bool_t fit(Int_t nSamples, const char* asciiFilePat) ;
54  Bool_t fit(Int_t nSamples, TList& dataSetList) ;
55  Bool_t addFitResult(const RooFitResult& fr) ;
56 
57  // Result accessors
58  const RooArgSet* fitParams(Int_t sampleNum) const ;
59  const RooFitResult* fitResult(Int_t sampleNum) const ;
60  RooAbsData* genData(Int_t sampleNum) const ;
61  const RooDataSet& fitParDataSet() ;
62  /// Return a RooDataSet containing the pre-fit parameters of each toy cycle.
63  const RooDataSet* genParDataSet() const {
64  // Return dataset with generator parameters for each toy. When constraints are used these
65  // may generally not be the same
66  return _genParData ;
67  }
68 
69  // Plot methods
70  RooPlot* plotParamOn(RooPlot* frame, const RooCmdArg& arg1=RooCmdArg::none(), const RooCmdArg& arg2=RooCmdArg::none(),
71  const RooCmdArg& arg3=RooCmdArg::none(), const RooCmdArg& arg4=RooCmdArg::none(),
72  const RooCmdArg& arg5=RooCmdArg::none(), const RooCmdArg& arg6=RooCmdArg::none(),
73  const RooCmdArg& arg7=RooCmdArg::none(), const RooCmdArg& arg8=RooCmdArg::none()) ;
74  RooPlot* plotParam(const RooRealVar& param, const RooCmdArg& arg1=RooCmdArg::none(), const RooCmdArg& arg2=RooCmdArg::none(),
75  const RooCmdArg& arg3=RooCmdArg::none(), const RooCmdArg& arg4=RooCmdArg::none(),
76  const RooCmdArg& arg5=RooCmdArg::none(), const RooCmdArg& arg6=RooCmdArg::none(),
77  const RooCmdArg& arg7=RooCmdArg::none(), const RooCmdArg& arg8=RooCmdArg::none()) ;
78  RooPlot* plotParam(const char* paramName, const RooCmdArg& arg1=RooCmdArg::none(), const RooCmdArg& arg2=RooCmdArg::none(),
79  const RooCmdArg& arg3=RooCmdArg::none(), const RooCmdArg& arg4=RooCmdArg::none(),
80  const RooCmdArg& arg5=RooCmdArg::none(), const RooCmdArg& arg6=RooCmdArg::none(),
81  const RooCmdArg& arg7=RooCmdArg::none(), const RooCmdArg& arg8=RooCmdArg::none()) ;
82  RooPlot* plotNLL(const RooCmdArg& arg1=RooCmdArg::none(), const RooCmdArg& arg2=RooCmdArg::none(),
83  const RooCmdArg& arg3=RooCmdArg::none(), const RooCmdArg& arg4=RooCmdArg::none(),
84  const RooCmdArg& arg5=RooCmdArg::none(), const RooCmdArg& arg6=RooCmdArg::none(),
85  const RooCmdArg& arg7=RooCmdArg::none(), const RooCmdArg& arg8=RooCmdArg::none()) ;
86  RooPlot* plotError(const RooRealVar& param, const RooCmdArg& arg1=RooCmdArg::none(), const RooCmdArg& arg2=RooCmdArg::none(),
87  const RooCmdArg& arg3=RooCmdArg::none(), const RooCmdArg& arg4=RooCmdArg::none(),
88  const RooCmdArg& arg5=RooCmdArg::none(), const RooCmdArg& arg6=RooCmdArg::none(),
89  const RooCmdArg& arg7=RooCmdArg::none(), const RooCmdArg& arg8=RooCmdArg::none()) ;
90  RooPlot* plotPull(const RooRealVar& param, const RooCmdArg& arg1, const RooCmdArg& arg2=RooCmdArg::none(),
91  const RooCmdArg& arg3=RooCmdArg::none(), const RooCmdArg& arg4=RooCmdArg::none(),
92  const RooCmdArg& arg5=RooCmdArg::none(), const RooCmdArg& arg6=RooCmdArg::none(),
93  const RooCmdArg& arg7=RooCmdArg::none(), const RooCmdArg& arg8=RooCmdArg::none()) ;
94 
95 
96  RooPlot* plotNLL(Double_t lo, Double_t hi, Int_t nBins=100) ;
97  RooPlot* plotError(const RooRealVar& param, Double_t lo, Double_t hi, Int_t nbins=100) ;
98  RooPlot* plotPull(const RooRealVar& param, Double_t lo=-3.0, Double_t hi=3.0, Int_t nbins=25, Bool_t fitGauss=kFALSE) ;
99 
100 protected:
101 
102  friend class RooAbsMCStudyModule ;
103 
104  RooPlot* makeFrameAndPlotCmd(const RooRealVar& param, RooLinkedList& cmdList, Bool_t symRange=kFALSE) const ;
105 
106  Bool_t run(Bool_t generate, Bool_t fit, Int_t nSamples, Int_t nEvtPerSample, Bool_t keepGenData, const char* asciiFilePat) ;
107  Bool_t fitSample(RooAbsData* genSample) ;
108  RooFitResult* doFit(RooAbsData* genSample) ;
109 
110  void calcPulls() ;
111 
112  RooAbsData* _genSample ; // Currently generated sample
113  RooAbsPdf* _genModel ; // Generator model
114  RooAbsGenContext* _genContext ; // Generator context
115  RooArgSet* _genInitParams ; // List of original generator parameters
116  RooArgSet* _genParams ; // List of actual generator parameters
117  const RooDataSet* _genProtoData ; // Generator prototype data set
118  RooArgSet _projDeps ; // List of projected dependents in fit
119 
120  RooAbsPdf* _constrPdf ; // Constraints p.d.f
121  RooAbsGenContext* _constrGenContext ; // Generator context for constraints p.d.f
122 
123  RooArgSet _dependents ; // List of dependents
124  RooArgSet _allDependents ; // List of generate + prototype dependents
125  RooAbsPdf* _fitModel ; // Fit model
126  RooArgSet* _fitInitParams ; // List of initial values of fit parameters
127  RooArgSet* _fitParams ; // List of actual fit parameters
128  RooRealVar* _nllVar ;
129  RooRealVar* _ngenVar ;
130 
131  TList _genDataList ; // List of generated data sample
132  TList _fitResList ; // List of RooFitResult fit output objects
133  RooDataSet* _genParData ; // List of of generated parameters of each sample
134  RooDataSet* _fitParData ; // Data set of fit parameters of each sample
135  TString _fitOptions ; // Fit options string
136  RooLinkedList _fitOptList ; // Fit option command list
137  Bool_t _extendedGen ; // Add poisson term to number of events to generate?
138  Bool_t _binGenData ; // Bin data between generating and fitting
139  Double_t _nExpGen ; // Number of expected events to generate in extended mode
140  Bool_t _randProto ; // Randomize order of prototype data access
141 
142  Bool_t _canAddFitResults ; // Allow adding of external fit results?
143  Bool_t _verboseGen ; // Verbose generation?
144  Bool_t _perExptGenParams ; // Do generation parameter change per event?
145  Bool_t _silence ; // Silent running mode?
146 
147  std::list<RooAbsMCStudyModule*> _modList ; // List of additional study modules ;
148 
149  // Utilities for modules ;
150  RooFitResult* refit(RooAbsData* genSample=0) ;
151  void resetFitParams() ;
152  virtual void RecursiveRemove(TObject *obj);
153 
154 private:
155 
156  RooMCStudy(const RooMCStudy&) ;
157 
158  ClassDef(RooMCStudy,0) // A general purpose toy Monte Carlo study manager
159 } ;
160 
161 
162 #endif
163