{ TFile *file = new TFile("rawData.root"); TTree *tree = (TTree*) file->Get("cbmsim"); cout << tree->GetEntries() << endl; TH1F *h_en = new TH1F("h_en", "", 55, 280, 390); tree->Draw("CaloRawHit.fEnergy>>h_en", "", ""); TCanvas *c1 = new TCanvas("c1", "", 10, 10, 450, 450); TPostScript *ps1 = new TPostScript("energy.eps", -113); ps1->Range(16, 16); h_en->Draw(); ps1->Close(); }