Added new tracking analysis script.

	new file:   scripts/rec_central_electrons.cxx

tracking/scripts/rec_central_electrons.cxx

+#include "ROOT/RDataFrame.hxx"
+#include <iostream>
+
+#include "dd4pod/Geant4ParticleCollection.h"
+#include "eicd/TrackParametersCollection.h"
+#include "eicd/ClusterCollection.h"
+#include "eicd/ClusterData.h"
+
+//namespace edm4hep {
+//
+//std::vector<float> pt (std::vector<MCParticleData> const& in){
+//  std::vector<float> result;
+//  for (size_t i = 0; i < in.size(); ++i) {
+//    result.push_back(std::sqrt(in[i].momentum.x * in[i].momentum.x + in[i].momentum.y * in[i].momentum.y));
+//  }
+//  return result;
+//}
+//
+//std::vector<float> eta(std::vector<MCParticleData> const& in){
+//  std::vector<float> result;
+//  ROOT::Math::PxPyPzMVector lv;
+//  for (size_t i = 0; i < in.size(); ++i) {
+//    lv.SetCoordinates(in[i].momentum.x, in[i].momentum.y, in[i].momentum.z, in[i].mass);
+//    result.push_back(lv.Eta());
+//  }
+//  return result;
+//}
+//
+//std::vector<float> cos_theta(std::vector<MCParticleData> const& in){
+//  std::vector<float> result;
+//  ROOT::Math::PxPyPzMVector lv;
+//  for (size_t i = 0; i < in.size(); ++i) {
+//    lv.SetCoordinates(in[i].momentum.x, in[i].momentum.y, in[i].momentum.z, in[i].mass);
+//    result.push_back(cos(lv.Theta()));
+//  }
+//  return result;
+//}
+//
+//}
+auto p_track = [](std::vector<eic::TrackParametersData> const& in) {
+  std::vector<double> result;
+  for (size_t i = 0; i < in.size(); ++i) {
+    result.push_back(std::abs(1.0/(in[i].qOverP)));
+  }
+  return result;
+};
+
+
+std::vector<float> pt (std::vector<dd4pod::Geant4ParticleData> const& in){
+  std::vector<float> result;
+  for (size_t i = 0; i < in.size(); ++i) {
+    result.push_back(std::sqrt(in[i].psx * in[i].psx + in[i].psy * in[i].psy));
+  }
+  return result;
+}
+
+using ROOT::RDataFrame;
+using namespace ROOT::VecOps;
+
+auto momentum = [](std::vector<ROOT::Math::PxPyPzMVector> const& in) {
+  std::vector<double> result;
+  for (size_t i = 0; i < in.size(); ++i) {
+   result.push_back(in[i].E());
+  }
+  return result;
+};
+auto theta = [](std::vector<ROOT::Math::PxPyPzMVector> const& in) {
+  std::vector<double> result;
+  for (size_t i = 0; i < in.size(); ++i) {
+   result.push_back(in[i].Theta()*180/M_PI);
+  }
+  return result;
+};
+auto fourvec = [](ROOT::VecOps::RVec<dd4pod::Geant4ParticleData> const& in) {
+  std::vector<ROOT::Math::PxPyPzMVector> result;
+  ROOT::Math::PxPyPzMVector lv;
+  for (size_t i = 0; i < in.size(); ++i) {
+    lv.SetCoordinates(in[i].psx, in[i].psy, in[i].psz, in[i].mass);
+    result.push_back(lv);
+  }
+  return result;
+};
+
+
+int rec_central_electrons(const char* fname = "topside/rec_central_electrons.root") {
+
+  ROOT::EnableImplicitMT();
+  ROOT::RDataFrame df("events", fname);
+
+  auto df0 = df.Define("isThrown", "mcparticles2.genStatus == 1")
+                 .Define("thrownParticles", "mcparticles2[isThrown]")
+                 .Define("thrownP", fourvec, {"thrownParticles"})
+                 .Define("p_thrown", momentum, {"thrownP"})
+                 .Define("nTracks", "outputTrackParameters.size()")
+                 .Define("p_track", p_track, {"outputTrackParameters"})
+                 .Define("delta_p",
+                         [](const std::vector<double> &tracks,
+                            const std::vector<double> &thrown) {
+                           std::vector<double> res;
+                           for (const auto &p1 : thrown) {
+                             for (const auto &p2 : tracks) {
+                               res.push_back(p1 - p2);
+                             }
+                           }
+                           return res;
+                         },
+                         {"p_track", "p_thrown"});
+
+  auto h_nTracks = df0.Histo1D({"h_nTracks", "; N tracks ", 10, 0, 10}, "nTracks");
+  auto h_pTracks = df0.Histo1D({"h_pTracks", "; GeV/c ", 100, 0, 10}, "p_track");
+  auto h_delta_p = df0.Histo1D({"h_delta_p", "; GeV/c ", 100, -10, 10}, "delta_p");
+
+  auto c = new TCanvas();
+
+  h_nTracks->DrawCopy();
+  c->SaveAs("results/rec_central_electrons_nTracks.png");
+
+  h_pTracks->DrawCopy();
+  c->SaveAs("results/rec_central_electrons_pTracks.png");
+
+  h_delta_p->DrawCopy();
+  c->SaveAs("results/rec_central_electrons_delta_p.png");
+
+  return 0;
+}