HistoToWorkspaceFactoryFast.h

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// @(#)root/roostats:$Id:  cranmer $
// Author: Kyle Cranmer, Akira Shibata
/*************************************************************************
 * Copyright (C) 1995-2008, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#ifndef ROOSTATS_HISTOTOWORKSPACEFACTORYFAST
#define ROOSTATS_HISTOTOWORKSPACEFACTORYFAST
 
#include <RooStats/HistFactory/Measurement.h>
 
#include <RooArgSet.h>
#include <RooDataSet.h>
#include <RooFitResult.h>
#include <RooPlot.h>
#include <RooWorkspace.h>
 
#include <TH1.h>
#include <TObject.h>
 
#include <vector>
#include <string>
#include <map>
#include <memory>
 
 
class ParamHistFunc;
class RooProduct;
class RooHistFunc;
 
namespace RooStats {
namespace HistFactory {
 
// Forward Declarations FTW
class Measurement;
class Channel;
class Sample;
 
class HistoToWorkspaceFactoryFast : public TObject {
 
public:
   /// \brief Configuration settings for HistFactory behavior.
   struct Configuration {
      /// \brief Enable or disable optimization for binned likelihood fits (default `true`).
      bool binnedFitOptimization = true;
      /// \brief Control whether whether combined workspace is written to a ROOT file (default `true`).
      bool createWorkspaceFile = true;
      /// \brief Control whether individual workspace files are created for each channel (default `true`).
      bool createPerRegionWorkspaces = true;
      /// \brief Control whether errors on the data histograms are stored in the workspace (default `false`).
      bool storeDataError = false;
   };
 
      HistoToWorkspaceFactoryFast() {}
      HistoToWorkspaceFactoryFast(RooStats::HistFactory::Measurement& Meas);
      HistoToWorkspaceFactoryFast(RooStats::HistFactory::Measurement& Meas, Configuration const& cfg);
 
      static void ConfigureWorkspaceForMeasurement( const std::string& ModelName,
                      RooWorkspace* ws_single,
                      Measurement& measurement );
 
      RooFit::OwningPtr<RooWorkspace> MakeSingleChannelModel( Measurement& measurement, Channel& channel );
      RooFit::OwningPtr<RooWorkspace>  MakeCombinedModel(std::vector<std::string>, std::vector<std::unique_ptr<RooWorkspace>>&);
 
      static RooFit::OwningPtr<RooWorkspace> MakeCombinedModel( Measurement& measurement, const Configuration& config);
      static RooFit::OwningPtr<RooWorkspace> MakeCombinedModel( Measurement& measurement );
      static void PrintCovarianceMatrix(RooFitResult* result, RooArgSet* params,
               std::string filename);
 
      void SetFunctionsToPreprocess(std::vector<std::string> lines) { fPreprocessFunctions=lines; }
 
    protected:
 
       void AddConstraintTerms(RooWorkspace& proto, Measurement& measurement, std::string prefix, std::string interpName,
               std::vector<OverallSys>& systList,
               std::vector<std::string>& likelihoodTermNames,
               std::vector<std::string>& totSystTermNames);
 
      std::unique_ptr<RooProduct> CreateNormFactor(RooWorkspace& proto, std::string& channel,
            std::string& sigmaEpsilon, Sample& sample, bool doRatio);
 
      std::unique_ptr<RooWorkspace> MakeSingleChannelWorkspace(Measurement& measurement, Channel& channel);
 
      void MakeTotalExpected(RooWorkspace& proto, const std::string& totName,
              const std::vector<RooProduct*>& sampleScaleFactors,
              std::vector<std::vector<RooAbsArg*>>&  sampleHistFuncs) const;
 
      RooHistFunc* MakeExpectedHistFunc(const TH1* hist, RooWorkspace& proto, std::string prefix,
          const RooArgList& observables) const;
 
      std::unique_ptr<TH1> MakeScaledUncertaintyHist(const std::string& Name,
                 std::vector< std::pair<const TH1*, std::unique_ptr<TH1>> > const& HistVec ) const;
 
      TH1* MakeAbsolUncertaintyHist( const std::string& Name, const TH1* Hist );
 
      void ConfigureHistFactoryDataset(RooDataSet& obsData, TH1 const& nominal, RooWorkspace& proto,
                   std::vector<std::string> const& obsNameVec);
 
      std::vector<std::string> fSystToFix;
      std::map<std::string, double> fParamValues;
      double fNomLumi = 1.0;
      double fLumiError = 0.0;
      int fLowBin = 0;
      int fHighBin = 0;
 
    private:
 
      void GuessObsNameVec(const TH1* hist);
 
      std::vector<std::string> fObsNameVec;
      std::string fObsName;
      std::vector<std::string> fPreprocessFunctions;
      const Configuration fCfg;
 
      RooArgList createObservables(const TH1 *hist, RooWorkspace &proto) const;
 
      ClassDefOverride(RooStats::HistFactory::HistoToWorkspaceFactoryFast,3)
    };
 
  }
}
 
#endif