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labels1.C File Reference

Detailed Description

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Setting alphanumeric labels in a 1-d histogram.

void labels1()
Int_t i;
const Int_t nx = 20;
const char *people[nx] = {"Jean","Pierre","Marie","Odile",
TCanvas *c1 = new TCanvas("c1","demo bin labels",10,10,900,500);
TH1F *h = new TH1F("h","test",nx,0,nx);
for (i=0;i<5000;i++) h->Fill(gRandom->Gaus(0.5*nx,0.2*nx));
for (i=1;i<=nx;i++) h->GetXaxis()->SetBinLabel(i,people[i-1]);
TPaveText *pt = new TPaveText(0.6,0.7,0.98,0.98,"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");
#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
1-D histogram with a float per channel (see TH1 documentation)
Definition TH1.h:621
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.
void Draw(Option_t *option="") override
Draw this pavetext with its current attributes.
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:275
TPaveText * pt
return c1
Definition legend1.C:41
Rene Brun

Definition in file labels1.C.