I made a fit from a TGraphErrors, like that :
(...) TGraphErrors * graph_llh = new TGraphErrors(nb_sa_histos, x, y, ex, ey) ; (...) graph_llh -> Fit("pol2") ; (...)
How could I simply get the parameters in my program. Ican see them in the canvas using
gStyle -> SetOptFit(11) ; But I would like to make some calculus using the fit parameters.
Thanks in advance for your help,