Hlabels 1

1-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 Thursday, May 19, 2022 at 08:12 AM.

In [1]:
const Int_t nx = 20;
const char *people[nx] = {"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",10,10,900,500);
c1->SetGrid();
c1->SetTopMargin(0.15);
TH1F *h = new TH1F("h","test",3,0,3);
h->SetStats(0);
h->SetFillColor(38);
h->SetCanExtend(TH1::kAllAxes);
for (Int_t i=0;i<5000;i++) {
   Int_t r = gRandom->Rndm()*20;
   h->Fill(people[r],1);
}
h->LabelsDeflate();
h->Draw();
TPaveText *pt = new TPaveText(0.7,0.85,0.98,0.98,"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()