Annoying axis through y=0

ROOT
#1

Hello folks,

Whenever I try to draw a graph, I get an annoying line through y=0. This is most prominent when your data ranges from -y to +y. Strangely enough, the line disappears when I run it with earlier versions of root (e.g 5.04). Is there a way to get rid of it.

gROOT->Reset();
void sample() 
{
  const int N=10;
  float x[N], y[N];

  for (int i=0;i<N;i++) {
    x[i]=i;
    y[i]=i-5;
  }


  TCanvas* c= new TCanvas("dd","Sample graph",10,10,400,400);

  TGraphErrors* gh= new TGraphErrors(N,x,y,0,0);
  gh->SetTitle("The line at y=0 is no good");
  gh->SetLineColor(2);
  gh->GetXaxis()->SetTitle("X");
  gh->GetYaxis()->SetTitle("Y");
  gh->GetYaxis()->CenterTitle(true);
  gh->GetXaxis()->CenterTitle(true);
  gh->Draw("ac");


  c->Update();

}

Thanks
Erdos

ROOT 5.12/00f
OSX PPC 10.4.9

PS: my rootlogon.C says:

{
gStyle->SetCanvasColor(0);
}


#2

This is fixed. See:
root.cern.ch/root/Version515.news.html
==> Basic Graphics
==> TGraph

#3

awesome… however, I can not upgrade to the latest version yet (group decision!!). Till then, defining a frame with appropriate xy range seems to fix the problem. e.g

{
  gROOT->Reset{};

  c1 = new TCanvas("c1","gerrors2",10,10,400,400);
  c1->SetFillColor(42);



 // draw a frame to define the range (credit: tutorials)
   TH1F *hr = c1->DrawFrame(1.5,-0.75,2.5,1);
   hr->SetXTitle("X title");
   hr->SetYTitle("Y title");
   c1->GetFrame()->SetFillColor(21);
   c1->GetFrame()->SetBorderSize(12);


   const Int_t N=3;

   Float_t z[N]={1.6,2.0,2.4};
   Float_t z1[N]={1.55,1.95,2.35};

   Float_t y1[N]={0.301,0.238,0.177};
   Float_t ey1[N]={0.075,0.127,0.217};

   Float_t y2[N]={-0.315,-0.321,-0.327};
   Float_t ey2[N]={0.038,0.06,0.1};


   gy1=new TGraphErrors(N,z,y1,0,ey1);
   gy1->SetMarkerStyle(24);
   gy1->Draw("P"); // important.. don't use the "A" option

   gy2=new TGraphErrors(N,z1,y2,0,ey2);
   gy2->SetMarkerStyle(25);
   gy2->Draw("P");

}

Thanks again ppl. and cheers
Erdos