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Reference Guide
HypoTestCalculatorGeneric.h
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1 // @(#)root/roostats:$Id$
2 // Author: Kyle Cranmer, Sven Kreiss 23/05/10
3 /*************************************************************************
4  * Copyright (C) 1995-2008, Rene Brun and Fons Rademakers. *
5  * All rights reserved. *
6  * *
7  * For the licensing terms see $ROOTSYS/LICENSE. *
8  * For the list of contributors see $ROOTSYS/README/CREDITS. *
9  *************************************************************************/
10 
11 #ifndef ROOSTATS_HypoTestCalculatorGeneric
12 #define ROOSTATS_HypoTestCalculatorGeneric
13 
14 
15 #ifndef ROOT_Rtypes
16 #include "Rtypes.h" // necessary for TNamed
17 #endif
18 
20 
21 #include "RooStats/ModelConfig.h"
22 
23 #include "RooStats/TestStatistic.h"
24 
26 
28 
30 
31 
32 namespace RooStats {
33 
35 
36  public:
38  const RooAbsData &data,
39  const ModelConfig &altModel,
40  const ModelConfig &nullModel,
41  TestStatSampler* sampler=0
42  );
43 
44 
46 
47 
48  public:
49 
50  /// inherited methods from HypoTestCalculator interface
51  virtual HypoTestResult* GetHypoTest() const;
52 
53  // set the model for the null hypothesis (only B)
54  virtual void SetNullModel(const ModelConfig &nullModel) { fNullModel = &nullModel; }
55  const RooAbsData * GetData(void) const { return fData; }
56  const ModelConfig* GetNullModel(void) const { return fNullModel; }
57  virtual const RooArgSet* GetFitInfo() const { return NULL; }
58  // set the model for the alternate hypothesis (S+B)
59  virtual void SetAlternateModel(const ModelConfig &altModel) { fAltModel = &altModel; }
60  const ModelConfig* GetAlternateModel(void) const { return fAltModel; }
61  // Set the DataSet
62  virtual void SetData(RooAbsData &data) { fData = &data; }
63 
64  // Returns instance of TestStatSampler. Use to change properties of
65  // TestStatSampler, e.g. GetTestStatSampler.SetTestSize(Double_t size);
67 
68  // set this for re-using always the same toys for alternate hypothesis in
69  // case of calls at different null parameter points
70  // This is useful to get more stable bands when running the HypoTest inversion
71  void UseSameAltToys();
72 
73 
74  protected:
75  // should return zero (to be used later for conditional flow)
76  virtual int CheckHook(void) const { return 0; }
77  virtual int PreNullHook(RooArgSet* /*parameterPoint*/, double /*obsTestStat*/) const { return 0; }
78  virtual int PreAltHook(RooArgSet* /*parameterPoint*/, double /*obsTestStat*/) const { return 0; }
79  virtual void PreHook() const { }
80  virtual void PostHook() const { }
81 
82  protected:
85  const RooAbsData *fData;
89 
90  unsigned int fAltToysSeed; // to have same toys for alternate
91 
92  private:
93  void SetupSampler(const ModelConfig& model) const;
94  void SetAdaptiveLimits(Double_t obsTestStat, Bool_t forNull) const;
96  ModelConfig *thisModel,
97  double obsTestStat,
98  RooAbsPdf *impDens=NULL,
99  const RooArgSet *impSnapshot=NULL
100  ) const;
101 
102 
103  protected:
105 };
106 }
107 
108 #endif
void SetupSampler(const ModelConfig &model) const
common setup for both models
void UseSameAltToys()
to re-use same toys for alternate hypothesis
SamplingDistribution * GenerateSamplingDistribution(ModelConfig *thisModel, double obsTestStat, RooAbsPdf *impDens=NULL, const RooArgSet *impSnapshot=NULL) const
ModelConfig is a simple class that holds configuration information specifying how a model should be u...
Definition: ModelConfig.h:30
const ModelConfig * GetAlternateModel(void) const
TestStatSampler is an interface class for a tools which produce RooStats SamplingDistributions.
HypoTestResult is a base class for results from hypothesis tests.
bool Bool_t
Definition: RtypesCore.h:59
#define NULL
Definition: RtypesCore.h:88
void SetAdaptiveLimits(Double_t obsTestStat, Bool_t forNull) const
Common base class for the Hypothesis Test Calculators.
#define ClassDef(name, id)
Definition: Rtypes.h:297
HypoTestCalculator is an interface class for a tools which produce RooStats HypoTestResults.
virtual void SetData(RooAbsData &data)
virtual HypoTestResult * GetHypoTest() const
inherited methods from HypoTestCalculator interface
RooAbsData is the common abstract base class for binned and unbinned datasets.
Definition: RooAbsData.h:37
This class simply holds a sampling distribution of some test statistic.
virtual void SetAlternateModel(const ModelConfig &altModel)
const RooAbsData * GetData(void) const
Namespace for the RooStats classes.
Definition: Asimov.h:20
double Double_t
Definition: RtypesCore.h:55
virtual int PreNullHook(RooArgSet *, double) const
virtual const RooArgSet * GetFitInfo() const
const ModelConfig * GetNullModel(void) const
HypoTestCalculatorGeneric(const RooAbsData &data, const ModelConfig &altModel, const ModelConfig &nullModel, TestStatSampler *sampler=0)
Constructor.
RooAbsPdf is the abstract interface for all probability density functions The class provides hybrid a...
Definition: RooAbsPdf.h:41
virtual int PreAltHook(RooArgSet *, double) const
virtual void SetNullModel(const ModelConfig &nullModel)
TestStatistic is an interface class to provide a facility for construction test statistics distributi...
Definition: TestStatistic.h:31
TestStatSampler * GetTestStatSampler(void) const