# value of the first parameter
p2 = fit_x.GetParameter(1)
p2 = round(p2,4)
# error of the first parameter
e2 = fit_x.GetParError(1)
e2 = round(e2,4)
print "Chi2 = " + str(chi2)
print "P1 = " + str(p1)
print "E1 = " + str(e1)
TVirtualFitter.GetFitter().GetConfidenceIntervals(grint)
grint.SetLineColor(1)
grint.SetFillColorAlpha(16,0.65)
grint.GetHistogram().SetTitle(" ");
grint.GetHistogram().GetXaxis().SetTitle("Top P_{T} (GeV)")
if(THEORY == "PWHGP8" ):
grint.GetHistogram().GetYaxis().SetTitle("DATA/Powheg+Pythia8")
elif(THEORY == "Kidonakis"):
grint.GetHistogram().GetYaxis().SetTitle("DATA/aN^3LO")
elif(THEORY == "Mitov"):
grint.GetHistogram().GetYaxis().SetTitle("DATA/NNLO")
elif(THEORY == "Lipka"):
grint.GetHistogram().GetYaxis().SetTitle("DATA/approx. NNLO")
elif(THEORY == "Pecjak"):
