Hi Rene, On Thu, 16 Aug 2001, Rene Brun wrote: I don't care about seeing those histograms after the function is done. I understand that they go out of scope. This is sample code designed to illustrate a problem that I do not understand. My question has to do with the continue statement. If I leave it in, CINT complains: Error: non class,struct,union object $gPad used with . or -> FILE:TestBug.C LINE:24 *** Interpreter error recovered *** Commenting out the continue statement I see that the histograms are filled 1000 times and the screen updates once every 10 fills. Yes, at the end of the function call everything disappears. mike > Mike, > You have many scoping problems in your macro. You should create > your objects in the heap if you want to still see them once > the macro has finished. > You will find below a simplification of your macro: > > Rene Brun > > > void test_bug(){ > TH1F *h1 = new TH1F("h1", "h1", 100, 1, 100); > TH1F *h2 = new TH1F("h2", "h2", 100, 100, 200); > TCanvas *can = new TCanvas("can", "can", 600, 800); > can->Divide(1,2); > can->cd(1); > TPad *pad1 = (TPad*)gPad; > h1->Draw(); > can->cd(2); > TPad *pad2 = (TPad*)gPad; > h2->Draw(); > Double_t result = 0; > Int_t i = 0; > while(i<1000){ > result = gRandom->Gaus(50, 5); > if(result < 50){ > i++; > continue; > } > h1->Fill(result); > h2->Fill(result*2); > if(i%10 == 0){ > pad1->Modified(); > pad2->Modified(); > can->Update(); > } > i++; > } > } > > > On Thu, 16 Aug 2001, Mike Kordosky wrote: > > > Hi, > > > > I have the following macro. The macro works as expected if I comment out > > the continue statement. When I leave continue in, CINT complains: > > > > root [1] test_bug(); > > Error: non class,struct,union object $gPad used with . or -> > > FILE:TestBug.C LINE:24 > > > > void test_bug(){ > > TH1F h1("h1", "h1", 100, 1, 100); > > TH1F h2("h2", "h2", 100, 100, 200); > > TCanvas can("can", "can", 1000, 1000); > > can.Divide(1,2); > > can.cd(1); > > h1.Draw(); > > can.cd(2); > > h2.Draw(); > > Double_t result = 0; > > Int_t i = 0; > > // for(Int_t i = 0; i<1000; i++){ > > while(i<1000){ > > result = gRandom->Gaus(50, 5); > > if(result < 50){ > > i++; > > continue; > > } > > h1.Fill(result); > > h2.Fill(result*2); > > if(i%10 == 0){ > > can.cd(1); > > h1.Draw(); > > gPad->Update(); > > can.cd(2); > > h2.Draw(); > > gPad->Update(); > > } > > i++; > > } > > } > > > > > > Is this a bug, or am I missing something? > > > > Mike Kordosky > > > > -- > > Graduate Research Assistant // High Energy Physics Lab > > kordosky@hep.utexas.edu // University of Texas at Austin > > kordosky@fnal.gov // > > ph: (512) 471-8426 (RLM Lab, Office) > > (512) 475-8673 (ENS Lab) > > > > > > > > > -- Graduate Research Assistant // High Energy Physics Lab kordosky@hep.utexas.edu // University of Texas at Austin kordosky@fnal.gov // ph: (512) 471-8426 (RLM Lab, Office) (512) 475-8673 (ENS Lab)
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