Formula based function: sqroot sqroot : x*gaus(0) + [3]*form1 Ndim= 1, Npar= 4, Number= 0 Formula expression: x*[p0]*exp(-0.5*((x-[p1])/[p2])*((x-[p1])/[p2]))+[p3]*(abs(sin(x)/x)) **************************************** Minimizer is Minuit2 / Migrad Chi2 = 198.935 NDf = 190 Edm = 1.49283e-07 NCalls = 149 p0 = 33.1658 +/- 0.545703 p1 = 4.00667 +/- 0.0165304 p2 = 0.984663 +/- 0.0128238 p3 = 63.4464 +/- 1.33233