High Level Factory: creation of a combined model
Author: Danilo Piparo
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, March 19, 2024 at 07:18 PM.
%%cpp -d
#include <fstream>
#include "TString.h"
#include "TROOT.h"
#include "RooGlobalFunc.h"
#include "RooWorkspace.h"
#include "RooRealVar.h"
#include "RooAbsPdf.h"
#include "RooDataSet.h"
#include "RooPlot.h"
#include "RooStats/HLFactory.h"
using namespace RooFit;
using namespace RooStats;
using std::ofstream;
create a card
TString card_name("HLFavtoryCombinationexample.rs");
ofstream ofile(card_name);
ofile << "// The simplest card for combination\n\n"
<< "gauss1 = Gaussian(x[0,100],mean1[50,0,100],4);\n"
<< "flat1 = Polynomial(x,0);\n"
<< "sb_model1 = SUM(nsig1[120,0,300]*gauss1 , nbkg1[100,0,1000]*flat1);\n"
<< "gauss2 = Gaussian(x,mean2[80,0,100],5);\n"
<< "flat2 = Polynomial(x,0);\n"
<< "sb_model2 = SUM(nsig2[90,0,400]*gauss2 , nbkg2[80,0,1000]*flat2);\n";
ofile.close();
HLFactory hlf("HLFavtoryCombinationexample", card_name, false);
hlf.AddChannel("model1", "sb_model1", "flat1");
hlf.AddChannel("model2", "sb_model2", "flat2");
auto pdf = hlf.GetTotSigBkgPdf();
auto thecat = hlf.GetTotCategory();
auto x = static_cast<RooRealVar *>(hlf.GetWs()->arg("x"));
auto data = pdf->generate(RooArgSet(*x, *thecat), Extended());
input_line_44:22:1: warning: 'data' shadows a declaration with the same name in the 'std' namespace; use '::data' to reference this declaration auto data = pdf->generate(RooArgSet(*x, *thecat), Extended()); ^
--- Perform extended ML fit of composite PDF to toy data ---
pdf->fitTo(*data);
input_line_53:2:14: error: reference to 'data' is ambiguous pdf->fitTo(*data); ^ input_line_44:22:6: note: candidate found by name lookup is 'data' auto data = pdf->generate(RooArgSet(*x, *thecat), Extended()); ^ /usr/include/c++/9/bits/range_access.h:318:5: note: candidate found by name lookup is 'std::data' data(initializer_list<_Tp> __il) noexcept ^ /usr/include/c++/9/bits/range_access.h:289:5: note: candidate found by name lookup is 'std::data' data(_Container& __cont) noexcept(noexcept(__cont.data())) ^ /usr/include/c++/9/bits/range_access.h:299:5: note: candidate found by name lookup is 'std::data' data(const _Container& __cont) noexcept(noexcept(__cont.data())) ^ /usr/include/c++/9/bits/range_access.h:309:5: note: candidate found by name lookup is 'std::data' data(_Tp (&__array)[_Nm]) noexcept ^
--- Plot toy data and composite PDF overlaid ---
auto xframe = x->frame();
data->plotOn(xframe);
thecat->setIndex(0);
pdf->plotOn(xframe, Slice(*thecat), ProjWData(*thecat, *data));
thecat->setIndex(1);
pdf->plotOn(xframe, Slice(*thecat), ProjWData(*thecat, *data));
gROOT->SetStyle("Plain");
xframe->Draw();
input_line_54:4:1: error: reference to 'data' is ambiguous data->plotOn(xframe); ^ input_line_44:22:6: note: candidate found by name lookup is 'data' auto data = pdf->generate(RooArgSet(*x, *thecat), Extended()); ^ /usr/include/c++/9/bits/range_access.h:318:5: note: candidate found by name lookup is 'std::data' data(initializer_list<_Tp> __il) noexcept ^ /usr/include/c++/9/bits/range_access.h:289:5: note: candidate found by name lookup is 'std::data' data(_Container& __cont) noexcept(noexcept(__cont.data())) ^ /usr/include/c++/9/bits/range_access.h:299:5: note: candidate found by name lookup is 'std::data' data(const _Container& __cont) noexcept(noexcept(__cont.data())) ^ /usr/include/c++/9/bits/range_access.h:309:5: note: candidate found by name lookup is 'std::data' data(_Tp (&__array)[_Nm]) noexcept ^ input_line_54:6:57: error: reference to 'data' is ambiguous pdf->plotOn(xframe, Slice(*thecat), ProjWData(*thecat, *data)); ^ input_line_44:22:6: note: candidate found by name lookup is 'data' auto data = pdf->generate(RooArgSet(*x, *thecat), Extended()); ^ /usr/include/c++/9/bits/range_access.h:318:5: note: candidate found by name lookup is 'std::data' data(initializer_list<_Tp> __il) noexcept ^ /usr/include/c++/9/bits/range_access.h:289:5: note: candidate found by name lookup is 'std::data' data(_Container& __cont) noexcept(noexcept(__cont.data())) ^ /usr/include/c++/9/bits/range_access.h:299:5: note: candidate found by name lookup is 'std::data' data(const _Container& __cont) noexcept(noexcept(__cont.data())) ^ /usr/include/c++/9/bits/range_access.h:309:5: note: candidate found by name lookup is 'std::data' data(_Tp (&__array)[_Nm]) noexcept ^ input_line_54:9:57: error: reference to 'data' is ambiguous pdf->plotOn(xframe, Slice(*thecat), ProjWData(*thecat, *data)); ^ input_line_44:22:6: note: candidate found by name lookup is 'data' auto data = pdf->generate(RooArgSet(*x, *thecat), Extended()); ^ /usr/include/c++/9/bits/range_access.h:318:5: note: candidate found by name lookup is 'std::data' data(initializer_list<_Tp> __il) noexcept ^ /usr/include/c++/9/bits/range_access.h:289:5: note: candidate found by name lookup is 'std::data' data(_Container& __cont) noexcept(noexcept(__cont.data())) ^ /usr/include/c++/9/bits/range_access.h:299:5: note: candidate found by name lookup is 'std::data' data(const _Container& __cont) noexcept(noexcept(__cont.data())) ^ /usr/include/c++/9/bits/range_access.h:309:5: note: candidate found by name lookup is 'std::data' data(_Tp (&__array)[_Nm]) noexcept ^
Draw all canvases
gROOT->GetListOfCanvases()->Draw()