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earth.C
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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/// - "MOLLWEIDE" : Draw a contour via an Mollweide projection
11///
12/// \macro_image
13/// \macro_code
14///
15/// \author Olivier Couet (from an original macro sent by Ernst-Jan Buis)
16
17TCanvas *earth(){
18
21
22 TCanvas *c1 = new TCanvas("c1","earth_projections",700,1000);
23 c1->Divide(2,3);
24
25 TH2F *ha = new TH2F("ha","Aitoff", 180, -180, 180, 179, -89.5, 89.5);
26 TH2F *hm = new TH2F("hm","Mercator", 180, -180, 180, 161, -80.5, 80.5);
27 TH2F *hs = new TH2F("hs","Sinusoidal",180, -180, 180, 181, -90.5, 90.5);
28 TH2F *hp = new TH2F("hp","Parabolic", 180, -180, 180, 181, -90.5, 90.5);
29 TH2F *hw = new TH2F("hw","Mollweide", 180, -180, 180, 181, -90.5, 90.5);
30
31 TString dat = gROOT->GetTutorialDir();
32 dat.Append("/graphics/earth.dat");
33 dat.ReplaceAll("/./","/");
34
35 ifstream in;
36 in.open(dat.Data());
37 Float_t x,y;
38 while (1) {
39 in >> x >> y;
40 if (!in.good()) break;
41 ha->Fill(x,y, 1);
42 hm->Fill(x,y, 1);
43 hs->Fill(x,y, 1);
44 hp->Fill(x,y, 1);
45 hw->Fill(x,y, 1);
46 }
47 in.close();
48
49 c1->cd(1); ha->Draw("aitoff");
50 c1->cd(2); hm->Draw("mercator");
51 c1->cd(3); hs->Draw("sinusoidal");
52 c1->cd(4); hp->Draw("parabolic");
53 c1->cd(5); hp->Draw("mollweide");
54
55 return c1;
56}
float Float_t
Definition RtypesCore.h:57
#define gROOT
Definition TROOT.h:406
R__EXTERN TStyle * gStyle
Definition TStyle.h:433
The Canvas class.
Definition TCanvas.h:23
void Draw(Option_t *option="") override
Draw this histogram with options.
Definition TH1.cxx:3063
2-D histogram with a float per channel (see TH1 documentation)}
Definition TH2.h:258
Int_t Fill(Double_t) override
Invalid Fill method.
Definition TH2.cxx:347
Basic string class.
Definition TString.h:139
const char * Data() const
Definition TString.h:380
TString & ReplaceAll(const TString &s1, const TString &s2)
Definition TString.h:704
TString & Append(const char *cs)
Definition TString.h:576
void SetOptTitle(Int_t tit=1)
Definition TStyle.h:332
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:1636
Double_t y[n]
Definition legend1.C:17
return c1
Definition legend1.C:41
Double_t x[n]
Definition legend1.C:17