How to insert TLatex "above" TPad

ROOT
1

Hello,

I have a very simple problem, but am not able to figure out an elegant solution.

Attached I have a plot (test.png) , which shows a TCanvas with 6 pads.
I’ve written a script (test.C) and attached it as well.

What I would like to do is :

  • Add a TLatex as a headline above to top 3 pads, to serve as the headline
    for all 6 pads. (TLatex in the script file)

  • Add a TLegend also above ( if possible in between the top and bottom pads)
    I just need one TLegend object, since all the markers etc. are the same anyway. (TLegend file in the script file)

Thanks in advance,
Sascha Falahat

test.png846×622 7.59 KB


test.C (6.26 KB)

2

Use the normalized coordinates:

  TLatex *   tex = new TLatex(0.5,0.5,"TEXT");
   tex->SetNDC();
3

Thanks for the reply.

But I am already doing right after the TLatex definition :

t->SetNDC(kTRUE);

and also tried your suggestion, but that does not work…

I attached a plot, which I changed by hand to show what I mean.

test.png846×622 7.97 KB

4 
{
        TCanvas *c = new TCanvas("c","c");
        TF1 f1("f1","x",-1,1);
        TF1 f2("f2","x*x",-1,1);
        TF1 f3("f3","x*x*x",-1,1);
        TF1 f4("f4","x*x*x*x",-1,1);
        c->Divide(2,2);
        c->cd(1); f1.Draw();
        c->cd(2); f2.Draw();
        c->cd(3); f3.Draw();
        c->cd(4); f4.Draw();

        c->cd(0);
        TPad p("p","p",0,0,1,1); p.Draw(); p->cd();
        p->SetFillStyle(0);
        TLatex t1(.5,.95,"TITLE HERE");
        TLatex t2(.5,.5,"LEGEND HERE");
        t1.SetTextAlign(21); t1.SetNDC(); t1.Draw();
        t2.SetTextAlign(21); t2.SetNDC(); t2.Draw();
}
5

Thousand thanks!