doc/v620/candlehisto_8C.html

void candlehisto()

{

   TCanvas *c1 = new TCanvas("c1", "Candle Presets", 800, 600);

   c1->Divide(3, 2);


   TRandom *rng = new TRandom();

   TH2I *h1 = new TH2I("h1", "Sin", 18, 0, 360, 100, -1.5, 1.5);

   h1->GetXaxis()->SetTitle("Deg");


   float myRand;

   for (int i = 0; i < 360; i+= 10) {

      for (int j = 0; j < 100; j++) {

         myRand = rng->Gaus(sin(i * 3.14 / 180), 0.2);

         h1->Fill(i, myRand);

      }

   }


   for (int i = 1; i < 7; i++) {

      c1->cd(i);

      TString title = TString::Format("CANDLEX%d", i);

      TH2I *myhist = (TH2I*)h1->DrawCopy(title);

      myhist->SetTitle(title);

   }


   TCanvas *c2 = new TCanvas("c2", "Violin Presets", 800, 300);

   c2->Divide(2, 1);


   for (int i = 1; i < 3; i++) {

      c2->cd(i);

      TString title = TString::Format("VIOLINX%d", i);

      TH2I *myhist = (TH2I*)h1->DrawCopy(title);

      myhist->SetFillColor(kGray + 2);

   }


   TCanvas *c3 = new TCanvas("c3", "Playing with candle and violin-options", 800, 600);

   c3->Divide(3, 2);

   TString myopt[6] = {"1000000", "2000000", "3000000", "1112111", "112111", "112111"};

   for (int i = 0; i < 6; i++) {

      c3->cd(i + 1);

      TString title = TString::Format("candlex(%s)", myopt[i].Data());

      TH2I *myhist = (TH2I*)h1->DrawCopy(title);

      myhist->SetFillColor(kYellow);

      if (i == 4) {

         TH2I *myhist2 = (TH2I*)h1->DrawCopy("candlex(1000000) same");

         myhist2->SetFillColor(kRed);

      }

      if (i == 5) {

         myhist->SetBarWidth(0.2);

         myhist->SetBarOffset(0.25);

         TH2I *myhist2 = (TH2I*)h1->DrawCopy("candlex(2000000) same");

         myhist2->SetFillColor(kRed);

         myhist2->SetBarWidth(0.6);

         myhist2->SetBarOffset(-0.5);

      }

      myhist->SetTitle(title);

   }

}

kGray
@ kGray
Definition: Rtypes.h:63

kRed
@ kRed
Definition: Rtypes.h:64

kYellow
@ kYellow
Definition: Rtypes.h:64

sin
double sin(double)

TAttFill::SetFillColor
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37

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

TH1::SetTitle
virtual void SetTitle(const char *title)
See GetStatOverflows for more information.
Definition: TH1.cxx:6333

TH1::GetXaxis
TAxis * GetXaxis()
Get the behaviour adopted by the object about the statoverflows. See EStatOverflows for more informat...
Definition: TH1.h:316

TH1::Fill
virtual Int_t Fill(Double_t x)
Increment bin with abscissa X by 1.
Definition: TH1.cxx:3275

TH1::SetBarWidth
virtual void SetBarWidth(Float_t width=0.5)
Definition: TH1.h:356

TH1::DrawCopy
virtual TH1 * DrawCopy(Option_t *option="", const char *name_postfix="_copy") const
Copy this histogram and Draw in the current pad.
Definition: TH1.cxx:3045

TH1::SetBarOffset
virtual void SetBarOffset(Float_t offset=0.25)
Definition: TH1.h:355

TH2I
2-D histogram with an int per channel (see TH1 documentation)}
Definition: TH2.h:212

TNamed::SetTitle
virtual void SetTitle(const char *title="")
Set the title of the TNamed.
Definition: TNamed.cxx:164

TRandom
This is the base class for the ROOT Random number generators.
Definition: TRandom.h:27

TRandom::Gaus
virtual Double_t Gaus(Double_t mean=0, Double_t sigma=1)
Samples a random number from the standard Normal (Gaussian) Distribution with the given mean and sigm...
Definition: TRandom.cxx:263

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

TString::Format
static TString Format(const char *fmt,...)
Static method which formats a string using a printf style format descriptor and return a TString.
Definition: TString.cxx:2311

c1
return c1
Definition: legend1.C:41

h1
TH1F * h1
Definition: legend1.C:5

c2
return c2
Definition: legend2.C:14

c3
return c3
Definition: legend3.C:15