{
// ... ROOT 6 is required ...
// TH2D *h = new TH2D("h", "correlation;PKUP tflash;FIMG tflash", ...);
TFile *f = TFile::Open("run200919.root");
TTreeReader trLess("PKUP");
TTreeReaderValue<int> less1(trLess, "BunchNumber");
TTreeReaderValue<double> less2(trLess, "tflash");
TTreeReader trMore("FIMG");
TTreeReaderValue<int> more1(trMore, "BunchNumber");
TTreeReaderValue<double> more2(trMore, "tflash");
trMore.Next(); // "load" the first entry
while (trLess.Next()) { // loop over all entries
while (*less1 == *more1) {
std::cout << *less1 << " " << *less2 << " " << *more2 << std::endl;
// h->Fill(*less2, *more2);
if (!(trMore.Next())) break; // "load" the next entry
}
}
delete f;
}