Logo ROOT   6.14/05
Reference Guide
candleplotstack.C
Go to the documentation of this file.
1 /// \file
2 /// \ingroup tutorial_hist
3 /// \notebook
4 /// Example showing how a THStack with candle plot option.
5 ///
6 /// \macro_image
7 /// \macro_code
8 ///
9 /// \authors Georg Troska, Olivier Couet
10 
11 void candleplotstack()
12 {
14  TRandom *rng = new TRandom();
15  TDatime *dateBegin = new TDatime(2010,1,1,0,0,0);
16  TDatime *dateEnd = new TDatime(2011,1,1,0,0,0);
17  int bins = 1000;
18  TH2I *h1 = new TH2I("h1","Machine A",6,dateBegin->Convert(),dateEnd->Convert(),bins,0,1000);
19  TH2I *h2 = new TH2I("h2","Machine B",6,dateBegin->Convert(),dateEnd->Convert(),bins,0,1000);
20  TH2I *hsum = new TH2I("h4","Sum",6,dateBegin->Convert(),dateEnd->Convert(),bins,0,1000);
21 
22  float Rand;
23  for (int i = dateBegin->Convert(); i < dateEnd->Convert(); i+=86400*30) {
24  for (int j = 0; j < 1000; j++) {
25  Rand = rng->Gaus(500+sin(i/10000000.)*100,50); h1->Fill(i,Rand); hsum->Fill(i,Rand);
26  Rand = rng->Gaus(500+sin(i/12000000.)*100,50); h2->Fill(i,Rand); hsum->Fill(i,Rand);
27  }
28  }
29 
30  h2->SetLineColor(kRed);
31  hsum->SetFillColor(kGreen);
32  TCanvas *c1 = new TCanvas();
33 
34  THStack *hs = new THStack("hs","Machine A+B");
35  hs->Add(h1);
36  hs->Add(h2,"candle2");
37  hs->Add(hsum, "violin1");
38  hs->Draw("candle3");
39  hs->GetXaxis()->SetNdivisions(410);
40 
41  gPad->SetGrid(1,0);
42 
43  hs->GetXaxis()->SetTimeDisplay(1);
44  hs->GetXaxis()->SetTimeFormat("%m/%y");
45  hs->GetXaxis()->SetTitle("Date [month/year]");
46 
47  c1->Modified();
48 
49  gPad->BuildLegend(0.75,0.75,0.95,0.95,"");
50 }
The Histogram stack class.
Definition: THStack.h:31
virtual void SetTimeFormat(const char *format="")
Change the format used for time plotting.
Definition: TAxis.cxx:1002
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:256
return c1
Definition: legend1.C:41
Definition: Rtypes.h:59
R__EXTERN TStyle * gStyle
Definition: TStyle.h:406
TAxis * GetXaxis() const
Get x axis of the histogram used to draw the stack.
Definition: THStack.cxx:601
virtual void SetNdivisions(Int_t n=510, Bool_t optim=kTRUE)
Set the number of divisions for this axis.
Definition: TAttAxis.cxx:229
Definition: Rtypes.h:59
void SetTimeOffset(Double_t toffset)
Change the time offset for time plotting.
Definition: TStyle.cxx:1655
virtual void Draw(Option_t *chopt="")
Draw this multihist with its current attributes.
Definition: THStack.cxx:445
This is the base class for the ROOT Random number generators.
Definition: TRandom.h:27
TH1F * h1
Definition: legend1.C:5
double sin(double)
virtual void SetTimeDisplay(Int_t value)
Definition: TAxis.h:161
The Canvas class.
Definition: TCanvas.h:31
virtual void Add(TH1 *h, Option_t *option="")
add a new histogram to the list Only 1-d and 2-d histograms currently supported.
Definition: THStack.cxx:359
UInt_t Convert(Bool_t toGMT=kFALSE) const
Convert fDatime from TDatime format to the standard time_t format.
Definition: TDatime.cxx:181
#define gPad
Definition: TVirtualPad.h:285
THist< 2, int, THistStatContent > TH2I
Definition: THist.hxx:293
2-D histogram with an int per channel (see TH1 documentation)}
Definition: TH2.h:211
Definition: hsum.py:1
Int_t Fill(Double_t)
Invalid Fill method.
Definition: TH2.cxx:292
virtual void SetTitle(const char *title="")
Set the title of the TNamed.
Definition: TNamed.cxx:164
void Modified(Bool_t flag=1)
Definition: TPad.h:414
This class stores the date and time with a precision of one second in an unsigned 32 bit word (950130...
Definition: TDatime.h:37