Logo ROOT  
Reference Guide
hlabels2.C File Reference

Detailed Description

View in nbviewer Open in SWAN
2-D histograms with alphanumeric labels.

TCanvas *hlabels2()
{
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);
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->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;
}
#define h(i)
Definition: RSha256.hxx:106
int Int_t
Definition: RtypesCore.h:45
R__EXTERN TRandom * gRandom
Definition: TRandom.h:62
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37
virtual void SetTextAlign(Short_t align=11)
Set the text alignment.
Definition: TAttText.h:42
The Canvas class.
Definition: TCanvas.h:23
@ kAllAxes
Definition: TH1.h:75
2-D histogram with a float per channel (see TH1 documentation)}
Definition: TH2.h:257
A Pave (see TPave) with text, lines or/and boxes inside.
Definition: TPaveText.h:21
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:187
void Draw(Option_t *option="") override
Draw this pavetext with its current attributes.
Definition: TPaveText.cxx:238
virtual void SetSeed(ULong_t seed=0)
Set the random generator seed.
Definition: TRandom.cxx:608
Double_t Rndm() override
Machine independent random number generator.
Definition: TRandom.cxx:552
TPaveText * pt
return c1
Definition: legend1.C:41
Author
Rene Brun

Definition in file hlabels2.C.