Hlabels 2

2-D histograms with alphanumeric labels.

Author: Rene Brun
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Monday, June 27, 2022 at 08:13 AM.

In [1]:
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",10,10,600,600);
c1->SetGrid();
c1->SetLeftMargin(0.15);
c1->SetBottomMargin(0.15);
TH2F *h = new TH2F("h","test",3,0,3,2,0,2);
h->SetCanExtend(TH1::kAllAxes);
h->SetStats(0);
gRandom->SetSeed();
for (Int_t i=0;i<15000;i++) {
   Int_t rx = gRandom->Rndm()*nx;
   Int_t ry = gRandom->Rndm()*ny;
   h->Fill(people[ry],month[rx],1);
}
h->LabelsDeflate("X");
h->LabelsDeflate("Y");
h->LabelsOption("v");
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();
return c1;

Draw all canvases

In [2]:
gROOT->GetListOfCanvases()->Draw()