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correctionlib RDataFrame examples
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# Example commands to build the C++ example (df.cc): | |
# cmake $(correction config --cmake) . | |
# make | |
cmake_minimum_required(VERSION 3.11) | |
project(correctionlibexample LANGUAGES CXX) | |
find_package(correctionlib REQUIRED) | |
set(THREADS_PREFER_PTHREAD_FLAG ON) | |
find_package(Threads) | |
find_package(ROOT REQUIRED COMPONENTS ROOTDataFrame) | |
add_executable(test_df df.cc) | |
target_link_libraries(test_df PRIVATE correctionlib ROOT::ROOTDataFrame) |
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#include "TFile.h" | |
#include "TCanvas.h" | |
#include "ROOT/RDataFrame.hxx" | |
#include "correction.h" | |
using correction::CorrectionSet; | |
using ROOT::VecOps::RVec; | |
int main(int argc, char** argv) { | |
auto f = TFile::Open("DY_M50_2016.root"); | |
auto df = ROOT::RDataFrame(*(f->Get<TTree>("Events"))); | |
auto cset = CorrectionSet::from_file("electron.json"); | |
auto cset_2016preID = cset->at("UL-Electron-ID-SF"); | |
auto df1 = df.Filter( | |
[] (unsigned int n, const RVec<float>& pt) { return n >= 1 && pt[0] > 10.; }, {"nElectron", "Electron_pt"} | |
).Define("leadElSF", | |
[cset_2016preID] (const RVec<float>& pt, const RVec<float>& eta) { | |
return cset_2016preID->evaluate({"2016preVFP", "sf", "wp90iso", std::abs(eta[0]), pt[0]}); | |
}, {"Electron_pt", "Electron_eta"}); | |
auto h = df1.Histo1D("leadElSF"); | |
TCanvas cv{"c1"}; | |
h->Draw(); | |
cv.Update(); | |
cv.SaveAs("df_compiled.png"); | |
return 1; | |
} |
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import ROOT as gbl | |
import correctionlib | |
correctionlib.register_pyroot_binding() | |
f = gbl.TFile.Open("DY_M50_2016.root") | |
df = gbl.ROOT.RDataFrame(f.Get("Events")) | |
gbl.gInterpreter.Declare('auto csetEl = correction::CorrectionSet::from_file("electron.json");') | |
gbl.gInterpreter.Declare('auto csetEl_2016preID = csetEl->at("UL-Electron-ID-SF");') | |
df = df.Filter("nElectron >= 1 && Electron_pt[0] > 10.").Define( | |
"leadElSF", | |
('csetEl_2016preID->evaluate({"2016preVFP", "sf", "wp90iso", ' | |
'std::abs(Electron_eta[0]), Electron_pt[0]})')) | |
h = df.Histo1D("leadElSF") | |
h.Draw() |
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