{
gStyle->SetOptStat(0);
gStyle->SetPaintTextFormat("6.2f");
gStyle->SetTitleOffset(1.5,"XY");
gStyle->SetHistMinimumZero(kTRUE);

TCanvas *c = new TCanvas("c1","c1");

TH2F *h = new TH2F("h1","h1",10,0,10,10,0,20);
h->Sumw2();
h->Fill(2,4,2);
h->Fill(1,16,3);
h->Fill(7,2,3);
h->SetMarkerSize(1.6);
h->Draw("TEXT,COLZ,ERROR");

c->SaveAs("test.pdf");
c->Close();
}