Label on the top of my graph

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1

Hi, how can i put this thing on the top of my graph ?

Cattura

Thank you

2

Hi alberto,
Have a look a the TPaveText class

Cheers
Stefano

3

Can you be a bit more precise ? what you are showing are the histogram statistics which are automatically displayed when you draw an histogram. What kind of “thing” do you want to put “on top of your graph” ?

4

i want to put a box in which i can add the information that i want to comunicate about my graph . Following Stefano i was able to create this :

Cattura

But now how can i insert the value of chi square in the box ? (without writing the number).

In order to create this i have used:

TPaveText *r=new TPaveText(0.8,0.8,1,1,“brNDC”);
r->AddText("#chi^{2}= ");
r->Draw();

Thanks

5

Hi alberto,
use the Form() method, which is basically a printf

Double_t chi2;
... 
Get the chi2
...
r->AddText(Form("#chi^{2}= %lf",chi2));

Cheers,
Stefano

6

Yes Form is the answer.
Note: if you need only a text (and no frame) you can use TLatex instead of TPaveText

7

Ok, great:smiley::smiley::smiley::smiley:

Thank you

1 Like
8

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