Follow-up Comment #2, bug #22032 (project relax): # Skip the error search. etapos = etapos_part / cpmg_frqs etaneg = etaneg_part / cpmg_frqs fact = Dpos * cosh(etapos) - Dneg * cos(etaneg) R2eff = r20_kex - cpmg_frqs * arccosh(fact) # Loop over the time points, back calculating the R2eff values. for i in range(num_points): back_calc[i] = R2eff[i] _______________________________________________________ Reply to this item at: <http://gna.org/bugs/?22032> _______________________________________________ Message sent via/by Gna! http://gna.org/