Logo ROOT  
Reference Guide
hlabels1.C File Reference

Detailed Description

View in nbviewer Open in SWAN 1-D histograms with alphanumeric labels

TCanvas *hlabels1()
{
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;
}
Author
Rene Brun

Definition in file hlabels1.C.

r
ROOT::R::TRInterface & r
Definition: Object.C:4
Int_t
int Int_t
Definition: RtypesCore.h:45
TPaveText::Draw
virtual void Draw(Option_t *option="")
Draw this pavetext with its current attributes.
Definition: TPaveText.cxx:234
h
#define h(i)
Definition: RSha256.hxx:124
gRandom
R__EXTERN TRandom * gRandom
Definition: TRandom.h:62
TRandom::Rndm
virtual Double_t Rndm()
Machine independent random number generator.
Definition: TRandom.cxx:541
TPaveText::AddText
virtual TText * AddText(Double_t x1, Double_t y1, const char *label)
Add a new Text line to this pavetext at given coordinates.
Definition: TPaveText.cxx:183
TCanvas
Definition: TCanvas.h:23
TH1F
1-D histogram with a float per channel (see TH1 documentation)}
Definition: TH1.h:572
TPaveText
Definition: TPaveText.h:21
TH1::kAllAxes
@ kAllAxes
Definition: TH1.h:74
pt
TPaveText * pt
Definition: entrylist_figure1.C:7
c1
return c1
Definition: legend1.C:41