Use of SetTimeFormat

ROOT
1

dear all :smiley:

I use a multigraph to plot data, each data is a one day representation. I tried to use SetTimeFormat function to show my data with time but I did not pass. :frowning:
Do you have some idea to do it ?

mg->GetXaxis()->SetTimeDisplay(1);
mg->GetXaxis()->SetTimeFormat("%d 2000-02-28 13:00:01"); ???

Best regards

hubhub

2

Can you provide a small script showing what “did not pass” ?

3

time.jpg1268×920 39.8 KB

Yes of course!

 const Int_t n = nbLignes;
 in.open("scores.txt");
 Double_t  x[n], data[n];
 Int_t  i(0);
 while (1) {

         in >> data[i] ; 
         if (!in.good()) break;
         x[i] = i;
         i++;
  
 }
in.close();


TMultiGraph *mg = new TMultiGraph();
TGraph *gr=new TGraph(n,x,data);
mg->Add(gr);
mg->Draw("ap");
mg->GetXaxis()->SetTimeDisplay(1);
mg->GetXaxis()->SetTimeFormat("%H %d %F2016-03-24 04:30:00");
4

can you send a script we can execute ?

5

yes, here it is ! :smiley:

#include <time.h>
#include "TStyle.h"
#include "Riostream.h"
#include "TGraph.h"
#include "TCanvas.h"
#include "TArrow.h"	
#include "TPaveLabel.h"
#include "TGaxis.h"
#include "TPad.h"
#include "TAxis.h"
#include "TLine.h"
#include "TPaveLabel.h"
#include "TEllipse.h"
#include "TText.h"
#include "TMultiGraph.h"
#include "TPaveText.h"
#include "TDatime.h"
#include "TH1F.h"
#include "TGaxis.h"

using namespace std;

int graphAnalyse()
{

 TCanvas *c1 = new TCanvas("c1","c1", 10,10,2000,1600);
 c1->SetGridx();
 c1->SetGridy(); 
 ifstream in;
 in.open("scores.txt");
 Int_t nbLignes(0);
 string ligne; 
 if (in)
 {
	while(getline(in, ligne))
	{
		if (ligne[0] == '#') continue;
		nbLignes++;
	}
 in.close();
 }
 else
 {
	cout << " le fichier n'existe pas " << endl;
 }
 cout << " le nombre de lignes du fichier est " << nbLignes << endl;
 /////////////////////////////////////////////////////////////////////
 const Int_t n = nbLignes;

 in.open("scores.txt"); 
 Double_t  x[n], data[n];
 Int_t  i(0);
 while (1) {
	 
	 in >> data[i] ; 
	 if (!in.good()) break;
	  x[i] = i;
	 i++;
	 
 }
in.close();


TMultiGraph *mg = new TMultiGraph();
TGraph *gr=new TGraph(n,x,data);
gr->SetMarkerStyle(kFullCircle);
mg->Add(gr);
mg->SetMaximum(1000);
mg->SetMinimum(0);
mg->Draw("ap");
mg->GetXaxis()->SetTimeDisplay(1);
mg->GetXaxis()->SetTimeFormat("%H %d %F2016-03-24 04:30:00"); 

gPad->Modified();

return 0;
}

and the score.txt file is

207
295
367
436
485
494
658
1407
766
763
807
785
786
6

For me it works. You asked to see the hour and day and that’s what you see…

7

yes, but each data is for one day so I would like to see for example
for my first data 207 => 24
then for 295 => 25
367 => 26
…

8

You x value are not date. Look root.cern.ch/how/how-create-axis-time-units
got to the end …

9

thank it works if I declare each x as time like this
TDatime da1(2016,03,24,15,30,00);
TDatime da2(2016,03,25,15,30,00);
TDatime da3(2016,03,26,15,30,00);
TDatime da4(2016,03,27,15,30,00);
TDatime da5(2016,03,28,15,30,00);
…
x[0] = da1.Convert();
x[1] = da2.Convert();
x[2] = da3.Convert();
x[3] = da4.Convert();
x[4] = da5.Convert();
x[5] = da6.Convert();
x[6] = da7.Convert();
…
TGraph *gr=new TGraph(n,x,data);
…
but I would like to do a loop. :mrgreen:
Is it possible ?

10 
but I would like to do a loop.  :mrgreen: 
Is it possible ?

Yes … just do it … what is the problem ?