Hi Rene,
Thanks a lot, both solutions worked ;-).
Best wishes,
Mina
Rene Brun wrote:
> Hi Nina,
>
> Use Beam_Energy1->SetMaximum(??)
> instead of
> Beam_Energy1->GetYaxis()->SetRange(MinE1,MaxE1);
>
> For your last problem, replace:
>
> tree2->Draw("beam.E() >> Beam_Energy2", "same");
> by
> tree2->Draw("beam.E() >> Beam_Energy2", "", "same");
>
> Rene Brun
>
> On Wed, 4 Dec 2002, Mina Nozar wrote:
>
> >
> > Hi all,
> >
> > I'm trying to set the maximum y range of two histograms to one, namely
> > the one taken from the histo with the maximum y-range.
> >
> > So I do something simple like the following in a root session, but I'm
> > not getting the "desired" result with no error messages.
> >
> > root [10] f1= new TFile("xxx.root");
> > root [11] TTree *tree1 = (TTree*) f1.Get("tree");
> > root [12] tree1.ls();
> > root [13] tree1.Print();
> > ...
> > root [20] f2 = new TFile("yyy.root");
> > root [23] TTree *tree2 = (TTree*) f2.Get("tree");
> > root [24] tree2.ls();
> > root [25] tree2.Print();
> > ...
> >
> > root [30] TH1F Beam_Energy1("Beam_Energy1","beam energy (GeV)",
> > 100,1,6);
> > root [31] tree1->Draw("beam.E() >> Beam_Energy1");
> > root [32] Int_t MinE1=0, MaxE1=0;
> > root [33] MaxE1 = int(0.01 *Beam_Energy1->GetMaximum() +
> > Beam_Energy1->GetMaximum());
> > root [34] MaxE1
> > (int)29920
> >
> > So far, so good... But when I do the following:
> >
> > root [35] Beam_Energy1->GetYaxis()->SetRange(MinE1,MaxE1);
> > root [36] tree1->Draw("beam.E() >> Beam_Energy1");
> > root [37] TH1F Beam_Energy2("Beam_Energy2","beam energy (GeV)",100,1,6);
> >
> > root [38] Beam_Energy2->GetYaxis()->SetRange(MinE1,MaxE1);
> > root [39] tree2->Draw("beam.E() >> Beam_Energy2");
> >
> >
> > But I don't see the maximum y-range of either of the histos set at 29920
> > as I wanted.
> >
> > Don't know what I've done "worng", any ideas?
> >
> > I actually resorted to drawing two histos on the same y-scale on two
> > different pads since I was unable to get the two "drawn" on the same
> > pad. I kept getting the error message "unkonwn name same" when I
> > tried:
> >
> > tree1->Draw("beam.E() >> Beam_Energy1");
> > tree2->Draw("beam.E() >> Beam_Energy2", "same");
> >
> > Drawing two or more histos/functions has worked for me before. I'm
> > guessing the reason it didn't work this time is that I have beam defined
> > as a pointer to a "TLorentzVector" type. In principle, it
> > should still work!
> >
> > Thanks in advance for any help or ideas...
> >
> > Mina
--
Mina Nozar
postdoctoral research associate
nozarm@jlab.org ----- Phone:(757)269-7175 ----- FAX:(757)269-5800
Thomas Jefferson National Accelerator Facility
MS 12H, 12000 Jefferson Ave. Newport News, VA 23606
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