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gerrors.C
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1/// \file
2/// \ingroup tutorial_graphs
3/// \notebook -js
4/// Draw a graph with error bars
5///
6/// \macro_image
7/// \macro_code
8///
9/// \author Rene Brun
10
11void gerrors() {
12 TCanvas *c1 = new TCanvas("c1","A Simple Graph with error bars",200,10,700,500);
13
14 c1->SetGrid();
15 c1->GetFrame()->SetBorderSize(12);
16
17 const Int_t n = 10;
18 Float_t x[n] = {-0.22, 0.05, 0.25, 0.35, 0.5, 0.61,0.7,0.85,0.89,0.95};
19 Float_t y[n] = {1,2.9,5.6,7.4,9,9.6,8.7,6.3,4.5,1};
20 Float_t ex[n] = {.05,.1,.07,.07,.04,.05,.06,.07,.08,.05};
21 Float_t ey[n] = {.8,.7,.6,.5,.4,.4,.5,.6,.7,.8};
23 gr->SetTitle("TGraphErrors Example");
25 gr->SetMarkerStyle(21);
26 gr->Draw("ALP");
27
28 c1->Update();
29}
int Int_t
Definition: RtypesCore.h:45
float Float_t
Definition: RtypesCore.h:57
virtual void SetMarkerColor(Color_t mcolor=1)
Set the marker color.
Definition: TAttMarker.h:38
virtual void SetMarkerStyle(Style_t mstyle=1)
Set the marker style.
Definition: TAttMarker.h:40
The Canvas class.
Definition: TCanvas.h:23
A TGraphErrors is a TGraph with error bars.
Definition: TGraphErrors.h:26
void Draw(Option_t *chopt="") override
Draw this graph with its current attributes.
Definition: TGraph.cxx:808
void SetTitle(const char *title="") override
Change (i.e.
Definition: TGraph.cxx:2338
Double_t y[n]
Definition: legend1.C:17
return c1
Definition: legend1.C:41
Double_t x[n]
Definition: legend1.C:17
Double_t ey[n]
Definition: legend1.C:17
const Int_t n
Definition: legend1.C:16
TGraphErrors * gr
Definition: legend1.C:25
Double_t ex[n]
Definition: legend1.C:17