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labels1.C
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1 /// \file
2 /// \ingroup tutorial_graphs
3 /// \notebook
4 /// Setting alphanumeric labels in a 1-d histogram.
5 ///
6 /// \macro_image
7 /// \macro_code
8 ///
9 /// \author Rene Brun
10 
11 void labels1()
12 {
13  Int_t i;
14  const Int_t nx = 20;
15  const char *people[nx] = {"Jean","Pierre","Marie","Odile",
16  "Sebastien","Fons","Rene","Nicolas","Xavier","Greg",
17  "Bjarne","Anton","Otto","Eddy","Peter","Pasha",
18  "Philippe","Suzanne","Jeff","Valery"};
19  TCanvas *c1 = new TCanvas("c1","demo bin labels",10,10,900,500);
20  c1->SetGrid();
21  c1->SetBottomMargin(0.15);
22  TH1F *h = new TH1F("h","test",nx,0,nx);
23  h->SetFillColor(38);
24  for (i=0;i<5000;i++) h->Fill(gRandom->Gaus(0.5*nx,0.2*nx));
25  h->SetStats(0);
26  for (i=1;i<=nx;i++) h->GetXaxis()->SetBinLabel(i,people[i-1]);
27  h->Draw();
28  TPaveText *pt = new TPaveText(0.6,0.7,0.98,0.98,"brNDC");
29  pt->SetFillColor(18);
30  pt->SetTextAlign(12);
31  pt->AddText("Use the axis Context Menu LabelsOption");
32  pt->AddText(" \"a\" to sort by alphabetic order");
33  pt->AddText(" \">\" to sort by decreasing values");
34  pt->AddText(" \"<\" to sort by increasing values");
35  pt->Draw();
36 }
TRandom::Gaus
virtual Double_t Gaus(Double_t mean=0, Double_t sigma=1)
Samples a random number from the standard Normal (Gaussian) Distribution with the given mean and sigm...
Definition: TRandom.cxx:263
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
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
pt
TPaveText * pt
Definition: entrylist_figure1.C:7
c1
return c1
Definition: legend1.C:41