Could you send a working script with the definition of g_e_resolution /
Rene Brun
On Mon, 11 Nov 2002, Mike Kordosky wrote:
> Hi,
>
> I am trying to do the following:
> (1) Take an existing graph
> (2) Set the x and y axis limits outside the data range
> (3) SetNdivisions
> (4) SetGridy
> (5) Set axis titles
>
> I cannot make this work to my satisfaction. I can get the axis ranges
> right with a call to TCanvas::DrawFrame. However, I cannot seem to get
> the axis titles to draw in this case. I do get gridlines, but calling
> SetNdivisions doesn't seem to allow me to modify them. If I don't call
> TCanvas::DrawFrame then the x axis cannot be scaled as desired with calls
> to TAxis::SetRangeUser or TAxis::SetRange. (Why?). I can scale the y axis
> with TGraph::SetMaximum and TGraph::SetMinimum (but why not
> TAxis::SetRangeUser?) in this case. Am I going about this all wrong?
>
> Here is my macro:
>
> {
> double msize=0.8;
> Axis_t xlow=0.5;
> Axis_t xhigh=3.5;
> Axis_t ylow=0.15;
> Axis_t yhigh=0.65;
>
> // electrons
> TCanvas* c_e_sep_resolution = new TCanvas("c_e_sep_resolution", "Electron
> Resolution");
>
> c_e_sep_resolution->DrawFrame(xlow,ylow,xhigh,yhigh);
>
> g_e_resolution->SetMarkerColor(kGreen);
> g_e_resolution->SetMarkerStyle(8);
> g_e_resolution->SetMarkerSize(msize);
>
> g_e_resolution->Draw("p");
> //g_e_resolution->SetMinimum(ylow);
> //g_e_resolution->SetMaximum(yhigh);
> //g_e_resolution->GetXaxis()->SetRangeUser(xlow, xhigh);
> g_e_resolution->GetHistogram()->SetTitle("");
> g_e_resolution->GetXaxis()->SetTitle("#sqrt{ E } (GeV^{1/2})");
> g_e_resolution->GetYaxis()->SetTitle("#frac{ #sigma }{ #mu }#sqrt{ E }");
> g_e_resolution->GetYaxis()->SetTitleSize(0.05);
> g_e_resolution->GetYaxis()->SetNdivisions(520);
> c_e_sep_resolution->SetGridy();
> gPad->Modified();
> // end electrons
>
> }
>
> I use root 3.03/02 on a linux machine with the egcs compiler.
>
> Mike Kordosky
>
> --
> Graduate Research Assistant // High Energy Physics Lab
> kordosky@hep.utexas.edu // University of Texas at Austin
> kordosky@fnal.gov //
> ph: (512) 471-8426 (RLM Lab, Office)
> (512) 475-8673 (ENS Lab)
>
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