labels2.C File Reference

Detailed Description

Setting alphanumeric labels.

 
void labels2()
{
   Int_t i;
   const Int_t nx = 12;
   const Int_t ny = 20;
   const char *month[nx] = {"January", "February", "March",     "April",   "May",      "June",
                            "July",    "August",   "September", "October", "November", "December"};
   const char *people[ny] = {"Jean",    "Pierre", "Marie",    "Odile",   "Sebastien", "Fons",  "Rene",
                             "Nicolas", "Xavier", "Greg",     "Bjarne",  "Anton",     "Otto",  "Eddy",
                             "Peter",   "Pasha",  "Philippe", "Suzanne", "Jeff",      "Valery"};
   TCanvas *c1 = new TCanvas("c1", "demo bin labels", 10, 10, 800, 800);
   c1->SetGrid();
   c1->SetLeftMargin(0.15);
   c1->SetBottomMargin(0.15);
   TH2F *h = new TH2F("h", "test", nx, 0, nx, ny, 0, ny);
   for (i = 0; i < 5000; i++) {
      h->Fill(gRandom->Gaus(0.5 * nx, 0.2 * nx), gRandom->Gaus(0.5 * ny, 0.2 * ny));
   }
   h->SetStats(0);
   for (i = 1; i <= nx; i++)
      h->GetXaxis()->SetBinLabel(i, month[i - 1]);
   for (i = 1; i <= ny; i++)
      h->GetYaxis()->SetBinLabel(i, people[i - 1]);
   h->Draw("text");
 
   TPaveText *pt = new TPaveText(0.6, 0.85, 0.98, 0.98, "brNDC");
   pt->SetFillColor(18);
   pt->SetTextAlign(12);
   pt->AddText("Use the axis Context Menu LabelsOption");
   pt->AddText(" \"a\"   to sort by alphabetic order");
   pt->AddText(" \">\"   to sort by decreasing values");
   pt->AddText(" \"<\"   to sort by increasing values");
   pt->Draw();
}

Author

Rene Brun

Definition in file labels2.C.