doc/v618/earth_8C.html

TCanvas *earth(){


   gStyle->SetOptTitle(1);

   gStyle->SetOptStat(0);


   TCanvas *c1 = new TCanvas("c1","earth_projections",700,700);

   c1->Divide(2,2);


   TH2F *ha = new TH2F("ha","Aitoff",    180, -180, 180, 179, -89.5, 89.5);

   TH2F *hm = new TH2F("hm","Mercator",  180, -180, 180, 161, -80.5, 80.5);

   TH2F *hs = new TH2F("hs","Sinusoidal",180, -180, 180, 181, -90.5, 90.5);

   TH2F *hp = new TH2F("hp","Parabolic", 180, -180, 180, 181, -90.5, 90.5);


   TString dat = gROOT->GetTutorialDir();

   dat.Append("/graphics/earth.dat");

   dat.ReplaceAll("/./","/");


   ifstream in;

   in.open(dat.Data());

   Float_t x,y;

   while (1) {

     in >> x >> y;

     if (!in.good()) break;

     ha->Fill(x,y, 1);

     hm->Fill(x,y, 1);

     hs->Fill(x,y, 1);

     hp->Fill(x,y, 1);

   }

   in.close();


   c1->cd(1); ha->Draw("aitoff");

   c1->cd(2); hm->Draw("mercator");

   c1->cd(3); hs->Draw("sinusoidal");

   c1->cd(4); hp->Draw("parabolic");


   return c1;

}

Float_t
float Float_t
Definition: RtypesCore.h:53

gROOT
#define gROOT
Definition: TROOT.h:414

gStyle
R__EXTERN TStyle * gStyle
Definition: TStyle.h:406

TCanvas
The Canvas class.
Definition: TCanvas.h:31

TH1::Draw
virtual void Draw(Option_t *option="")
Draw this histogram with options.
Definition: TH1.cxx:2981

TH2F
2-D histogram with a float per channel (see TH1 documentation)}
Definition: TH2.h:248

TH2::Fill
Int_t Fill(Double_t)
Invalid Fill method.
Definition: TH2.cxx:292

TString
Basic string class.
Definition: TString.h:131

TString::Data
const char * Data() const
Definition: TString.h:364

TString::ReplaceAll
TString & ReplaceAll(const TString &s1, const TString &s2)
Definition: TString.h:687

TString::Append
TString & Append(const char *cs)
Definition: TString.h:559

TStyle::SetOptTitle
void SetOptTitle(Int_t tit=1)
Definition: TStyle.h:312

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:1444

c1
return c1
Definition: legend1.C:41

y
Double_t y[n]
Definition: legend1.C:17

x
Double_t x[n]
Definition: legend1.C:17