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Reference Guide
labels2.C File Reference

Detailed Description

View in nbviewer Open in SWAN 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.

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
TH2F
2-D histogram with a float per channel (see TH1 documentation)}
Definition: TH2.h:251
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
TPaveText
Definition: TPaveText.h:21
pt
TPaveText * pt
Definition: entrylist_figure1.C:7
c1
return c1
Definition: legend1.C:41