Time stamp and File name in the graph plot

ROOT
1

Hi,

I have a question about time stamp and file name in the graph. I want to write the time stamp (current date and time) and the file name in the graph which I draw by ROOT automatically.
I create pdf and png format graphs and I occasionally update them. So, I need the date, time and the file name of the graph. Otherwise, I am confused which is latest version data and files.
I do not know how to do these even though I am searching the website for that so far.
Would someone tell me how to write the time stamp and the file name automatically by ROOT for me?

Thank you,

2

see: root.cern.ch/root/html514/TStyle … SetOptDate

eg

gStyle->SetOptDate(1); hist->draw();
Rene

3

Thank you very much and it works.
However, I draw 2 graphs in one page.

e.g.
can1 -> Divide(1,2);
can1 -> cd(1);
…
…
can2 -> cd(2);
…

then, the timestamp is under the graph, that means root overwrites the graph (the canvas) on the timestamp. How can I fix it?
In addition, how can I write the filename on the graph page automatically such as pdf files or png files?

4

You can enlarge the bottom margin when you divide the canvas:

c->Divide(2,1,0.02,0.05)

For the file name you should draw a TText in normalized coordinates:

 hpx->Draw();
 TText *t = new TText()
 t->DrawTextNDC(.5,.91,"hsimple.root")
5

Thank you very much and I could write the timestamp and the file name on the graph.
I think we do not have the command to write the file name automatically like the timestamp in root system. Is it right?

6

You are right, there is nothing automatic for the file name.

7

I see, and thank you for your reply!