{
   gROOT->Reset();
   gStyle->SetOptTitle(0);
   TCanvas c1("c2pad","c2pad",900,700);
   gStyle->SetPadBorderMode(0);
   gStyle->SetOptStat(0);
   gStyle->SetPadTickX(1);
   gStyle->SetPadTickY(1);
   TH2F h2("h2", "h2", 10, 0, 1, 10, 0, 1);
   Int_t i;
   for(i = 0; i < 10000; ++i) {
      h2.Fill(gRandom->Exp(0.5), gRandom->Gaus(0.5, 0.2));
   }
   h1 = h2.ProjectionX("h1");
   h1->SetNdivisions(505, "Y");
   
   TPad top_pad("top_pad", "top_pad",0,0.2, 1.0, 1.0);
   top_pad.Draw();
   top_pad.cd();
   top_pad.SetBottomMargin(0);
   h2->GetYaxis()->SetLabelFont(63);
   h2->GetYaxis()->SetLabelSize(20);
   h2.Draw();

   c1.cd();
   TPad bottom_pad("bottom_pad", "bottom_pad", 0, 0., 1.0, 0.2);
   bottom_pad.Draw();
   bottom_pad.cd();
   bottom_pad->SetTopMargin(0);
   h1->GetYaxis()->SetLabelFont(63);
   h1->GetYaxis()->SetLabelSize(20);
   h1->Draw();
}