Print Branch with array data

ROOT
12

Hi Sima,

I figured out how to print these Particle.Px values. Not with TTree::SetBranchAddress() functionality though, but with TTreeReader one. Hope that’s okay:

        TFile* myfile = TFile::Open("ttbar.root");

        TTreeReader myReader("LHEF", myfile);
        TTreeReaderArray<Double_t> particlePx(myReader, "Particle.Px");

        while (myReader.Next())
        {
                if (myReader.GetCurrentEntry() % 10000 == 0)
                {
                        printf("\tProcessing entry #%05lli out of %05lli: %lu particle(s)...\n", myReader.GetCurrentEntry(), myReader.GetEntries(false), particlePx.GetSize());
                        for (unsigned short pxIt = 0; pxIt < particlePx.GetSize(); ++pxIt)
                                printf("\t\tParticle #%02u: Px = %f\n", pxIt, particlePx[pxIt]);
                }
        }
        myfile->Close();