TMultiGraphRange

Hi…

I have the usual question…
How to define the TMultiGraphRange…
(I am fighting since more than one hour now)

I’ve tried:

   TCanvas* c1 = new TCanvas("S", "S",800,600);
   TMultiGraph *mg = new TMultiGraph();
   mg->Add(TFinal800,"LP");
   mg->Add(TFinal500,"LP");
   mg->Add(TFinal300,"LP");
   mg->Add(TFinal200,"LP");
   mg->Add(TFinal130,"LP");
   mg->Draw("A");
   mg->SetMinimum(0);
   mg->GetXaxis()->SetTitle("Integrated Luminosity (Pb^{-1})");
   mg->GetYaxis()->SetTitle("Estimated Significance");
   c1->SetLogx(true);
   c1->Modified(); c1->Update();
   mg->GetXaxis()->SetRange(0.5,1500);

but does’nt give the expected result…

Can you tell me the exact procedure?
note the .C file generated by TCanvas::SaveAs() is available here:
~querten/public/Final_SignificanceCurveNoSign.C

thanks in advance,
Loic

Example:

{
   TGraph *g[3];
   Double_t x[10] = {0,1,2,3,4,5,6,7,8,9};
   Double_t y[10] = {1,2,3,4,5,5,4,3,2,1};
   TMultiGraph *mg = new TMultiGraph();
   for (int i=0; i<3; i++) {
      g[i] = new TGraph(10, x, y);
      g[i]->SetMarkerStyle(20);
      g[i]->SetMarkerColor(i+2);
      for (int j=0; j<10; j++) y[j] = y[j]-1;
      mg->Add(g[i]);
   }
   mg->Draw("AP");
   mg->GetXaxis()->SetTitle("E_{#gamma} (GeV)");
   mg->GetYaxis()->SetTitle("Coefficients");

   gPad->Modified();
   mg->GetXaxis()->SetRange(29,65);     
}

You can also define a Frame with
gPad->DrawFrame(…) and draw the multigraph without option A

thanks the DrawFrame method works…
the other one is basically what I’ve tried already (Or am I missing something?)

Loic,

Well, both are working for me.

Loic,

What has worked for me is

mg -> Draw(“alp”);
mg -> GetXaxis() -> SetRangeUser(4,54);
gPad -> Modified();

In your example code you have the gPad -> Modified() before setting the range. Try placing it after.

-S