Hi,
I'm new to ROOT and there are a few things that I can not get to work. I like the TreeViewer that can be lanched from the TBrowser, but I have a problem setting the y-range. With the following script I create a root file
//************************
TFile* file = new TFile("test.root","RECREATE");
TNtuple* data = new TNtuple("data","","Temperature:Resistance");
double T, R;
for( T = 10.0; T < 300.0; T += 1.0 )
{
R = T*T; data->Fill(T,R);
file->Write();
file->Close();
}
//*************************
I can open this root file in the TBrowser and I can view the TNtuple with the TreeViewer. I drag the Temperature branch to X and the Resistance branch to Y and I click on the button to draw the graph. This creates a nice graph, but I want to change the appearance of the y-scale.
I want to have a logaritmic y-scale. So I click on the canvas and choose SetLogy. This changes the y-scale from around 2.5e3 to 1e5. Well, I want to see all the data, so I click on the y-axis and select SetRangeUser. I fill in 10 for ufirst and 1e7 for ulast. This changes the y-range from 3e5 to 1e7.
2) How can I change the y-range? (preferably without having to type things on the ROOT command line)
I'm using ROOT Version 5.05/01 21 September 2005, Compiled on 26 October 2005 for linux after downloading the CVS version.
Thanks,
Hajo Molegraaf
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