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candleplotstack.C File Reference

Detailed Description

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Example showing how a THStack with candle plot option.

void candleplotstack()
{
auto rng = new TRandom();
auto dateBegin = new TDatime(2010,1,1,0,0,0);
auto dateEnd = new TDatime(2011,1,1,0,0,0);
int bins = 1000;
auto h1 = new TH2I("h1","Machine A",6,dateBegin->Convert(),dateEnd->Convert(),bins,0,1000);
auto h2 = new TH2I("h2","Machine B",6,dateBegin->Convert(),dateEnd->Convert(),bins,0,1000);
auto hsum = new TH2I("h4","Sum",6,dateBegin->Convert(),dateEnd->Convert(),bins,0,1000);
float Rand;
for (int i = dateBegin->Convert(); i < dateEnd->Convert(); i+=86400*30) {
for (int j = 0; j < 1000; j++) {
Rand = rng->Gaus(500+sin(i/10000000.)*100,50); h1->Fill(i,Rand); hsum->Fill(i,Rand);
Rand = rng->Gaus(500+sin(i/12000000.)*100,50); h2->Fill(i,Rand); hsum->Fill(i,Rand);
}
}
h2->SetLineColor(kRed);
hsum->SetFillColor(kGreen);
TCanvas *c1 = new TCanvas();
auto hs = new THStack("hs","Machine A+B");
hs->Add(h1);
hs->Add(h2,"candle2");
hs->Add(hsum, "violin1");
hs->Draw("candle3");
hs->GetXaxis()->SetNdivisions(410);
gPad->SetGrid(1,0);
hs->GetXaxis()->SetTimeDisplay(1);
hs->GetXaxis()->SetTimeFormat("%m/%y");
hs->GetXaxis()->SetTitle("Date [month/year]");
c1->Modified();
gPad->BuildLegend(0.75,0.75,0.95,0.95,"");
}
@ kRed
Definition Rtypes.h:66
@ kGreen
Definition Rtypes.h:66
R__EXTERN TStyle * gStyle
Definition TStyle.h:433
#define gPad
The Canvas class.
Definition TCanvas.h:23
This class stores the date and time with a precision of one second in an unsigned 32 bit word (950130...
Definition TDatime.h:37
virtual Int_t Fill(Double_t x)
Increment bin with abscissa X by 1.
Definition TH1.cxx:3340
2-D histogram with an int per channel (see TH1 documentation)
Definition TH2.h:217
The Histogram stack class.
Definition THStack.h:40
This is the base class for the ROOT Random number generators.
Definition TRandom.h:27
void SetTimeOffset(Double_t toffset)
Change the time offset for time plotting.
Definition TStyle.cxx:1909
return c1
Definition legend1.C:41
TH1F * h1
Definition legend1.C:5
Definition hsum.py:1
Authors
Georg Troska, Olivier Couet

Definition in file candleplotstack.C.