Dear Mr. Rustige, I'm a ROOT new user, so I can suggest you a solution for the second problem, only. I usually create manually the pads, so I can set their dimensions. TCanvas *c4 = new TCanvas("c4","salca",100,10,900,820); TPad *pad41 = new TPad("pad41","one", 0, 0.5, 0.5, 1); TPad *pad42 = new TPad("pad42","two", 0.5, 0.5, 1, 1); TPad *pad43 = new TPad("pad43","three", 0, 0, 0.5, 0.5); TPad *pad44 = new TPad("pad44","four", 0.5, 0, 1, 0.5); pad41->Draw(); pad42->Draw(); pad43->Draw(); pad44->Draw(); cheers pietro Tobias Rustige wrote: > Dear rooters, > > > > I wrote the following macro: > > > > { > gROOT->Reset(); > TCanvas c1("c1","multipads",500,500); > gStyle->SetPadBorderMode(0); > gStyle->SetOptStat(0); > c1.Divide(2,2,0,0); > TH2F h1("h1","test1",100,-10,10,180,0,180); > TH2F h2("h2","test3",50,-5,5,180,0,180); > TH2F h3("h3","test4",10000,-10,10,1800,0,180); > > ifstream in; > in.open("basic.dat", ios::in); > > > > Float_t x,y,z; > Int_t nlines = 0; > > while (1) { > in >> x >> y ; > if (!in.good()) break; > h1->Fill(x,y); > h2->Fill(x,y); > h3->Fill(x,y); > > nlines++; > } > printf(" found %d points\n",nlines); > > > > in.close(); > > > > c1.cd(1); > gPad->SetBottomMargin(0); > gPad->SetRightMargin(0); > gPad->SetTickx(2); > h1->SetOption("lego"); > h1.Draw(); > > > > c1.cd(2); > gPad->SetLeftMargin(0); > gPad->SetBottomMargin(0); > gPad->SetTickx(2); > gPad->SetTicky(2); > h1.GetYaxis()->SetLabelOffset(0.01); > h1->SetOption("surf3"); > h1.Draw(); > > c1.cd(3); > gPad->SetTopMargin(0); > gPad->SetRightMargin(0); > h2->SetOption("scat"); > h2.Draw(); > > > > c1.cd(4); > gPad->SetLeftMargin(0); > gPad->SetTopMargin(0); > gPad->SetTicky(2); > h2->SetOption("surf3"); > h2.Draw(); > > } > > > > > > There, as you can see , are several plotting options, intended to get > printout with two different types of plottingts in every line based on > the values in the data basic.dat, which contains the raw data of a > sinogram. But if you look what happens in root , it is the following: > > > > > > > > So you see, although I sayd that ar least two pictures should be a > scatter plot, always the same type of plotting appears. > > > > I do not understand this, where is my mistake ?? > > > > Please heeelp me. > > > > > > And how can I create between those pads of a canvas a little distance, > that it looks more nice. > > > > Thanks for your commands > > > > > > With my best regards > > > > Tobias Rustige > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
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