Hi Rooters, Maybe a beginner's problem. I want to clone stuff from canvas c1( whole c1 or just one pad c1_1) into canvas c2(Maybe onto the whole canvas c2 or just one of the pad c2_2). I tried but did not successeed. It even crash my canvas c1(Histogram gone). For example: root [0] TFile f1("one.root"); root [1] c1->Draw(); root [2] c1_1->cd(); root [3] TPad *p1; root [4] p1 = (TPad *)c1_1->Clone(); // Here c1 crash root [5] c2 = new TCanvas("c2","c2"); root [6] c2->cd(); root [7] c2->Divide(2,2); root [8] c2_2->cd(); root [9] p1->Draw(); *** Break *** segmentation violation It is basically the same when I try using mouse like DrawClone().( I am not so sure how to use it though.) Can anyone tell me what is going on or what I should do? Thanks, Hongquan
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