void point_not_seen() {

   TCanvas *c1 = new TCanvas("c1","",200,10,700,900);
   c1->Divide(1,2);
   gStyle->SetMarkerStyle(20);
   lin1 = new TF1("lin1","1",0,10);
   lin2 = new TF1("lin2","2",0,10);
   h1 = new TH1F("h1","h1",20,0,10);
   h2 = new TH1F("h2","h2",20,0,10);
   h1->Sumw2();   
   h2->Sumw2(); 
   h1->FillRandom("lin1",1000);
   h2->FillRandom("lin2",1000);
   h2->Divide(h1);

   c1->cd(1);
   TH2F *frame1 = new TH2F("frame1","",2,0,10,2,25,75);
   frame1->SetStats(0);
   frame1->Draw("");
   h1->Draw("e1same");

   c1->cd(2);
   TH2F *frame2 = new TH2F("frame2","",2,0,10,2,47,53);
   frame2->SetStats(0);
   frame2->Draw("");
   h1->Draw("e1same");
}