Legend with Fit

Newbie
1

Hi, I am currently working on a plot. I have 1 canvas diveded in 2 plots. For both of the plots I am making a Fit with a function and I would like to add a legend to the canvas adding the 2 graphs and the Fit line as well. For some reason there is no legend on the canvas.
My code looks something like this:

TCanvas * can = new TCanvas(...);
TGraph * f = new TGraph();
TGraph * g = new TGraph();

can->Divide(2,1);
can->cd(1);

... plotting of data ...

TF1 *Fit = new TF1("Fit","[0]/sqrt(x)",0,100000);
f->Fit(Fit);

f->Draw("ALP")

can->cd(2);

... plotting of data ...

g->Fit(Fit);

TLegend *leg = new TLegend(.....);
leg->AddEntry(Fit,"Fit","l");
leg->AddEntry(f,"Error f","lp");
leg->AddEntry(g,"Error g","lp");
leg->Draw();

g->Draw("ALP")

_ROOT Version:_ 6.24/06
_Platform:_ Ubuntu 21.04
_Compiler:_ g++
___
2

g->Draw("ALP") first clears the pad (destroying its previous contents), then draws the g

4

Ok perfect so I will first draw f and g and then draw the legend and fit. Thank you very much, you have been saving me a whole afternoon of struggles :stuck_out_tongue_winking_eye: