int time_axis()
{ 
  TCanvas *c1 = (TCanvas*)gROOT->FindObject("can1");
  if(c1) c1->Close();
  TH1F *hme = (TH1F*)gROOT->FindObject("West_1_V_neg");
  if(hme) hme->Delete();

  TCanvas *can1 = new TCanvas("can1","Examples of TGaxis",10,10,800,700); 
  can1->Divide(2,2);

  TH1F *West_1_V_neg = new TH1F("West_1_V_neg","West 1 HV -ve;Time;V",8640,0,86400);
  West_1_V_neg->GetXaxis()->SetTimeDisplay(1); 
  West_1_V_neg->GetXaxis()->SetLabelOffset(0.02); 
  West_1_V_neg->GetXaxis()->SetTimeFormat("%H:%M"); 
  West_1_V_neg->SetLineColor(kBlue);
  West_1_V_neg->GetXaxis()->SetTitleOffset(1.2);
  West_1_V_neg->GetYaxis()->SetTitleOffset(0.95);

  int start_time;

  TTimeStamp *timeme = new TTimeStamp(1262062801, kFALSE, -5*60*60);
  start_time = (int)timeme->AsDouble();

  West_1_V_neg->GetXaxis()->SetTimeOffset(start_time, "gmt");
 
  can1->cd(1);

  West_1_V_neg->DrawCopy();

  can1->cd(2);

  West_1_V_neg->GetXaxis()->SetTimeOffset(start_time);
  West_1_V_neg->DrawCopy();

  delete timeme;

  TTimeStamp *timeme = new TTimeStamp(1262062801);
  start_time = (int)timeme->AsDouble();

  can1->cd(3);

  West_1_V_neg->GetXaxis()->SetTimeOffset(start_time);
  West_1_V_neg->DrawCopy();

  can1->cd(4);

  West_1_V_neg->GetXaxis()->SetTimeOffset(start_time, "gmt");
  West_1_V_neg->Draw();



  return 0;
}