Hi, I want to do something which seems relatively simple, but I can't get it to work: I have a TGraphErrors object in one file, and a TTree object in another file. I want to superimpose a scatter plot from the Tree onto the Graph. I want to do this for a specified axis range and use log scales in x and y. So I use the macro below. The problem is that I get the points from the graph, but no scatter plot. It seems that ROOT doesn't like my attempt to superimpose a scatter plot on a pre-existing frame. (i.e. I first use a gPad->DrawFrame(. . .) then an h14->Draw("y:x", "SAME") ) Is there a fix for this? Thanks, Scott Sampson Columbia University Int_t plt() { c1->Clear(); TFile *g = new TFile("lepto/nc_cc_xsec2.root"); TTree *h14 = (TTree*)g->Get("h14") ; TFile *f = new TFile("root/graphs.root"); TGraphErrors *tgr = (TGraphErrors *)f->Get("grx"); MakePad(1,2,1,1); gPad->SetLogx(); gPad->SetLogy(); gPad->DrawFrame(0.01,0.01,1.0,1000); tgr->Draw("P"); h14->Draw("sig/(xh-xl):xc","flg==0","SAME"); gPad->Update(); }
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