The index of sub pads begin with 1 instead of 0.
Try to modify your for loop as:
for (Int_t i=1; i<3; i++){
^^^
canvas->cd(i);
...
}
Best Regards.
Aihong
On Tue, 15 Feb 2000, Burt Holzman wrote:
> Hello, ROOTers.
>
> I don't know if this is a known problem (or feature), but if I
> attempt to split up a canvas and draw inside of a for loop, ROOT
> seems to ignore the TCanvas::Divide() and just draw the objects
> at the end. A short sample macro is below. Am I doing something
> wrong?
>
> - B
>
> ----
>
> {
> TCanvas *canvas = new TCanvas("canvas", "canvas");
> canvas->Divide(1,2);
> TF1 *func[2];
>
> TF1 *func[0] = new TF1("func[1]", "sin(x)", 0, 5);
> TF1 *func[1] = new TF1("func[1]", "cos(x)", 0, 5);
> for (Int_t i=0; i<2; ++i) {
> canvas->cd(i);
> func[i]->Draw();
> }
> }
>
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