Logo ROOT  
Reference Guide
earth.C
Go to the documentation of this file.
1/// \file
2/// \ingroup tutorial_graphics
3/// \notebook
4/// This tutorial illustrates the special contour options.
5///
6/// - "AITOFF" : Draw a contour via an AITOFF projection
7/// - "MERCATOR" : Draw a contour via an Mercator projection
8/// - "SINUSOIDAL" : Draw a contour via an Sinusoidal projection
9/// - "PARABOLIC" : Draw a contour via an Parabolic projection
10///
11/// \macro_image
12/// \macro_code
13///
14/// \author Olivier Couet (from an original macro sent by Ernst-Jan Buis)
15
16TCanvas *earth(){
17
20
21 TCanvas *c1 = new TCanvas("c1","earth_projections",700,700);
22 c1->Divide(2,2);
23
24 TH2F *ha = new TH2F("ha","Aitoff", 180, -180, 180, 179, -89.5, 89.5);
25 TH2F *hm = new TH2F("hm","Mercator", 180, -180, 180, 161, -80.5, 80.5);
26 TH2F *hs = new TH2F("hs","Sinusoidal",180, -180, 180, 181, -90.5, 90.5);
27 TH2F *hp = new TH2F("hp","Parabolic", 180, -180, 180, 181, -90.5, 90.5);
28
29 TString dat = gROOT->GetTutorialDir();
30 dat.Append("/graphics/earth.dat");
31 dat.ReplaceAll("/./","/");
32
33 ifstream in;
34 in.open(dat.Data());
35 Float_t x,y;
36 while (1) {
37 in >> x >> y;
38 if (!in.good()) break;
39 ha->Fill(x,y, 1);
40 hm->Fill(x,y, 1);
41 hs->Fill(x,y, 1);
42 hp->Fill(x,y, 1);
43 }
44 in.close();
45
46 c1->cd(1); ha->Draw("aitoff");
47 c1->cd(2); hm->Draw("mercator");
48 c1->cd(3); hs->Draw("sinusoidal");
49 c1->cd(4); hp->Draw("parabolic");
50
51 return c1;
52}
float Float_t
Definition: RtypesCore.h:57
#define gROOT
Definition: TROOT.h:404
R__EXTERN TStyle * gStyle
Definition: TStyle.h:412
The Canvas class.
Definition: TCanvas.h:23
virtual void Draw(Option_t *option="")
Draw this histogram with options.
Definition: TH1.cxx:3074
2-D histogram with a float per channel (see TH1 documentation)}
Definition: TH2.h:251
Int_t Fill(Double_t)
Invalid Fill method.
Definition: TH2.cxx:358
Basic string class.
Definition: TString.h:136
const char * Data() const
Definition: TString.h:369
TString & ReplaceAll(const TString &s1, const TString &s2)
Definition: TString.h:692
TString & Append(const char *cs)
Definition: TString.h:564
void SetOptTitle(Int_t tit=1)
Definition: TStyle.h:318
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:1589
return c1
Definition: legend1.C:41
Double_t y[n]
Definition: legend1.C:17
Double_t x[n]
Definition: legend1.C:17