Hello, Sorry if this is a simple question....... I am trying to divide two histograms, each one comes from a TChain made up of .root files. I realse the histograms have to be renamed before they can be divided but the suggested way of doing this is using: TFile *f = new TFile("myfile.root"); f->ls(); TH2D h810;1 Hist title TH2D h811;1 Hist title h810->Draw(); // this works h811->Draw(); // this works TH2D *num = (TH2D*)f->Get("h810"); TH2D *den = (TH2D*)f->Get("h811"); num->Divide(den); // this works! how-ever I have more than one file so what would I need to put in place of f in this example? Thanks Emily.
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