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legend1.C
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1 {
2  TCanvas *c1 = new TCanvas("c1","c1",600,500);
3  gStyle->SetOptStat(0);
4 
5  TH1F *h1 = new TH1F("h1","TLegend Example",200,-10,10);
6  h1->FillRandom("gaus",30000);
7  h1->SetFillColor(kGreen);
8  h1->SetFillStyle(3003);
9  h1->Draw();
10 
11  TF1 *f1=new TF1("f1","1000*TMath::Abs(sin(x)/x)",-10,10);
12  f1->SetLineColor(kBlue);
13  f1->SetLineWidth(4);
14  f1->Draw("same");
15 
16  const Int_t n = 20;
17  Double_t x[n], y[n], ex[n], ey[n];
18  for (Int_t i=0;i<n;i++) {
19  x[i] = i*0.1;
20  y[i] = 1000*sin(x[i]+0.2);
21  x[i] = 17.8*x[i]-8.9;
22  ex[i] = 1.0;
23  ey[i] = 10.*i;
24  }
26  gr->SetName("gr");
27  gr->SetLineColor(kRed);
28  gr->SetLineWidth(2);
29  gr->SetMarkerStyle(21);
30  gr->SetMarkerSize(1.3);
31  gr->SetMarkerColor(7);
32  gr->Draw("P");
33 
34  leg = new TLegend(0.1,0.7,0.48,0.9);
35  leg->SetHeader("The Legend Title");
36  leg->AddEntry(h1,"Histogram filled with random numbers","f");
37  leg->AddEntry("f1","Function abs(#frac{sin(x)}{x})","l");
38  leg->AddEntry("gr","Graph with error bars","lep");
39  leg->Draw();
40 
41  return c1;
42 }
43 
ex
Double_t ex[n]
Definition: legend1.C:17
n
const Int_t n
Definition: legend1.C:16
TGraph::Draw
virtual void Draw(Option_t *chopt="")
Draw this graph with its current attributes.
Definition: TGraph.cxx:760
kGreen
@ kGreen
Definition: Rtypes.h:66
Int_t
int Int_t
Definition: RtypesCore.h:45
sin
double sin(double)
x
Double_t x[n]
Definition: legend1.C:17
h1
TH1F * h1
Definition: legend1.C:5
gStyle
R__EXTERN TStyle * gStyle
Definition: TStyle.h:412
TGraph::SetName
virtual void SetName(const char *name="")
Set graph name.
Definition: TGraph.cxx:2308
gr
TGraphErrors * gr
Definition: legend1.C:25
y
Double_t y[n]
Definition: legend1.C:17
ey
Double_t ey[n]
Definition: legend1.C:17
kRed
@ kRed
Definition: Rtypes.h:66
TH1::FillRandom
virtual void FillRandom(const char *fname, Int_t ntimes=5000)
Fill histogram following distribution in function fname.
Definition: TH1.cxx:3444
TStyle::SetOptStat
void SetOptStat(Int_t stat=1)
The type of information printed in the histogram statistics box can be selected via the parameter mod...
Definition: TStyle.cxx:1592
f1
TF1 * f1
Definition: legend1.C:11
Double_t
double Double_t
Definition: RtypesCore.h:59
TGraphErrors
Definition: TGraphErrors.h:26
TCanvas
Definition: TCanvas.h:23
TH1F
1-D histogram with a float per channel (see TH1 documentation)}
Definition: TH1.h:572
TF1::Draw
virtual void Draw(Option_t *option="")
Draw this function with its current attributes.
Definition: TF1.cxx:1338
leg
leg
Definition: legend1.C:34
kBlue
@ kBlue
Definition: Rtypes.h:66
TLegend
Definition: TLegend.h:23
TF1
1-Dim function class
Definition: TF1.h:212
TH1::Draw
virtual void Draw(Option_t *option="")
Draw this histogram with options.
Definition: TH1.cxx:2997
c1
return c1
Definition: legend1.C:41