candlehisto.C

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/// \file
/// \ingroup tutorial_hist
/// \notebook
/// Example showing how to combine the various candle plot options.
///
/// \macro_image
/// \macro_code
///
/// \author Georg Troska

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);
   }
}