Hello Mr. Marotta,
Having different histograms and different pads I use a code like this to
draw the histograms:
{
// create a canvas
TCanvas *c1 = new TCanvas("c1","canvas1",100,10,900,820);
// create pads and draw them
TPad *pad1 = new TPad("pad1","one", 0, 0.5, 0.5, 1);
TPad *pad2 = new TPad("pad2","two", 0.5, 0.5, 1, 1);
TPad *pad3 = new TPad("pad3","three", 0, 0, 0.5, 0.5);
TPad *pad4 = new TPad("pad4","four", 0.5, 0, 1, 0.5);
pad1->Draw();
pad2->Draw();
pad3->Draw();
pad4->Draw();
// go into each pad and draw your existing histograms
pad1->cd();
hist01->Draw();
pad2->cd();
hist02->Draw();
pad3->cd();
hist02->Draw();
pad4->cd();
hist02->Draw();
}
I hope I gave you a useful suggetion, best regards
pietro
On Mon, 8 Jul 2002 jpmarott@email.arizona.edu wrote:
>Hello,
>I am trying to draw several (4) histograms that have already been booked,
>filled, and written to file into a pre-existing, subdivided TCanvas object.
> The ROOT manual says that this can be done quite easily, but I'm completely
>unclear as to how. I would assume that you could say something like:
>histname = TPad->Draw();
>
>but this seems to give me a segmentation fault. Is there something that
>I completely missed? If there's any easier way of displaying multiple histograms
>on the same canvas, please, let me know.
>Thanks,
>Joe Marotta
>
>
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