AnalysisTreeQA

git clone git@git.cbm.gsi.de:pwg-c2f/data/analysis_tree_qa.git
(https://git.cbm.gsi.de/pwg-c2f/data/analysis_tree_qa.git)
cd analysis_tree_qa
mkdir build install
cd build
cmake -DCMAKE_INSTALL_PREFIX=../install ../
make -j install

// Manager instance: filelist, treename
QA::Manager man(filelist, "aTree"); 

// 1D histo: {branch_name, field_name}, {nbins, min, max}
man.AddEntry({"VtxTracks", "nhits"}, {15, 0, 15}); 

// AnalysisTree::Variable in case of more complicated plot
Variable chi2_over_ndf("chi2/ndf", "VtxTracks", {"chi2", "ndf"}, []( std::vector<double>& var ) { return var.at(0)/var.at(1); });
man.AddEntry(chi2_over_ndf, {100, 0, 100});

// 2D histo:
man.AddEntry2D({{"VtxTracks", "dcax"}, {"VtxTracks", "dcay"}}, {{nbins, -1, 1}});

// Histogramm with additional cut:
Cuts* mc_protons = new Cuts("McProtons", "SimTracks");
mc_protons->AddCut( {"pid", 2212-0.5, 2212+0.5} );
man.AddEntry({"VtxTracks", "dcax"}, {nbins, -1, 1}, mc_protons);

man.Run();