doc/v622/hf001__example_8C.html

#include "RooStats/HistFactory/Measurement.h"

#include "RooStats/HistFactory/MakeModelAndMeasurementsFast.h"

#include "TFile.h"

#include "TROOT.h"


using namespace RooStats;

using namespace HistFactory;


void hf001_example() {


  std::string InputFile = "./data/example.root";

  // in case the file is not found

  bool bfile = gSystem->AccessPathName(InputFile.c_str());

  if (bfile) {

     std::cout << "Input file is not found - run prepareHistFactory script " << std::endl;

     gROOT->ProcessLine(".! prepareHistFactory .");

     bfile = gSystem->AccessPathName(InputFile.c_str());

     if (bfile) {

        std::cout << "Still no " << InputFile << ", giving up.\n";

        exit(1);

     }

  }


  // Create the measurement

  Measurement meas("meas", "meas");


  meas.SetOutputFilePrefix( "./results/example_UsingC" );

  meas.SetPOI( "SigXsecOverSM" );

  meas.AddConstantParam("alpha_syst1");

  meas.AddConstantParam("Lumi");


  meas.SetLumi( 1.0 );

  meas.SetLumiRelErr( 0.10 );

  meas.SetExportOnly( false );

  meas.SetBinHigh( 2 );


  // Create a channel


  Channel chan( "channel1" );

  chan.SetData( "data", InputFile );

  chan.SetStatErrorConfig( 0.05, "Poisson" );


  // Now, create some samples


  // Create the signal sample

  Sample signal( "signal", "signal", InputFile );

  signal.AddOverallSys( "syst1",  0.95, 1.05 );

  signal.AddNormFactor( "SigXsecOverSM", 1, 0, 3 );

  chan.AddSample( signal );


  // Background 1

  Sample background1( "background1", "background1", InputFile );

  background1.ActivateStatError( "background1_statUncert", InputFile );

  background1.AddOverallSys( "syst2", 0.95, 1.05  );

  chan.AddSample( background1 );


  // Background 1

  Sample background2( "background2", "background2", InputFile );

  background2.ActivateStatError();

  background2.AddOverallSys( "syst3", 0.95, 1.05  );

  chan.AddSample( background2 );


  // Done with this channel

  // Add it to the measurement:

  meas.AddChannel( chan );


  // Collect the histograms from their files,

  // print some output,

  meas.CollectHistograms();

  meas.PrintTree();


  // One can print XML code to an

  // output directory:

  // meas.PrintXML( "xmlFromCCode", meas.GetOutputFilePrefix() );


  // Now, do the measurement

  MakeModelAndMeasurementFast( meas );


}

MakeModelAndMeasurementsFast.h

Measurement.h

TFile.h

TROOT.h

gROOT
#define gROOT
Definition: TROOT.h:406

gSystem
R__EXTERN TSystem * gSystem
Definition: TSystem.h:556

TSystem::AccessPathName
virtual Bool_t AccessPathName(const char *path, EAccessMode mode=kFileExists)
Returns FALSE if one can access a file using the specified access mode.
Definition: TSystem.cxx:1291

RooStats::HistFactory::MakeModelAndMeasurementFast
RooWorkspace * MakeModelAndMeasurementFast(RooStats::HistFactory::Measurement &measurement)
Definition: MakeModelAndMeasurementsFast.cxx:105

RooFit::HistFactory
@ HistFactory
Definition: RooGlobalFunc.h:69

RooStats
Namespace for the RooStats classes.
Definition: Asimov.h:19