TGraph

From: Alexander Zvyagin (zvyagin@mx.ihep.su)
Date: Wed May 13 1998 - 06:03:49 MEST 

                                           IHEP, Protvino, Russia, 13-MAY-1998

    Dear ROOT team,

I want to draw TGraph where range of axe X is x_max/x_min=1e6. It seems that
graph axis has limitation x_max/x_min<1e3. Is it possible to overcome this
limitation?

Example of Macro:

void e2(void)
{
  gROOT->Reset();

  Float_t E_min=1e-3, E_max=1e3;
  
  const Int_t N_points_max = 1111;
  Int_t N_points;
  Float_t x[N_points_max],y[N_points_max],x_err[N_points_max],
  y_err[N_points_max];

  for( N_points=0; N_points<N_points_max; N_points++ )
  {
    x     [N_points]    = E_min+(E_max-E_min)*(Float_t)(N_points)
    /N_points_max;
    x_err [N_points]    = 0;
    y     [N_points]    = 1;
    y_err [N_points]    = 0;
  }

  TGraphErrors *graph = new TGraphErrors(N_points,x,y,x_err,y_err);

  c1 = new TCanvas("c1","Test",200,10,700,500);

  c1->SetLogx(1);

  graph->SetTitle("?????????????");
  graph->Draw("AP");

  c1->Update();
}

Thanks in advance,
Alexander Zvyagin.

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