Logo ROOT  
Reference Guide
timeonaxis2.C
Go to the documentation of this file.
1/// \file
2/// \ingroup tutorial_graphs
3/// \notebook
4/// Define the time offset as 2003, January 1st.
5///
6/// \macro_image
7/// \macro_code
8///
9/// \author Olivier Couet
10
11TCanvas *timeonaxis2() {
12 TCanvas *ct2 = new TCanvas("ct2","ct2",10,10,700,500);
13
14 TDatime T0(2003, 1, 1, 0, 0, 0);
15 int X0 = T0.Convert();
17
18 // Define the lowest histogram limit as 2002, September 23rd
19 TDatime T1(2002, 9, 23, 0, 0, 0);
20 int X1 = T1.Convert()-X0;
21
22 // Define the highest histogram limit as 2003, March 7th
23 TDatime T2(2003, 3, 7, 0, 0, 0);
24 int X2 = T2.Convert(1)-X0;
25
26 TH1F * h1 = new TH1F("h1","test",100,X1,X2);
27
28 TRandom r;
29 for (Int_t i=0;i<30000;i++) {
30 Double_t noise = r.Gaus(0.5*(X1+X2),0.1*(X2-X1));
31 h1->Fill(noise);
32 }
33
35 h1->GetXaxis()->SetLabelSize(0.03);
36 h1->GetXaxis()->SetTimeFormat("%Y/%m/%d");
37 h1->Draw();
38 return ct2;
39}
int Int_t
Definition: RtypesCore.h:45
double Double_t
Definition: RtypesCore.h:59
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t r
R__EXTERN TStyle * gStyle
Definition: TStyle.h:414
virtual void SetLabelSize(Float_t size=0.04)
Set size of axis labels.
Definition: TAttAxis.cxx:206
virtual void SetTimeDisplay(Int_t value)
Definition: TAxis.h:162
virtual void SetTimeFormat(const char *format="")
Change the format used for time plotting.
Definition: TAxis.cxx:1052
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
1-D histogram with a float per channel (see TH1 documentation)}
Definition: TH1.h:574
TAxis * GetXaxis()
Definition: TH1.h:319
virtual Int_t Fill(Double_t x)
Increment bin with abscissa X by 1.
Definition: TH1.cxx:3338
void Draw(Option_t *option="") override
Draw this histogram with options.
Definition: TH1.cxx:3060
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:1806
TH1F * h1
Definition: legend1.C:5
#define T2
Definition: md5.inl:147
#define T1
Definition: md5.inl:146