{"coeffs": [-2.0664326061907168e-07, 1.6645454138598596e-06, 0.3901806436753824, 0.0017887950227413788], "function": "fpl = lambda t, Cl, Cu, A, k: (Cl + ((Cu - Cl) / (1 + numpy.exp((A - t) / k))))", "log_ftol": 1e-08, "errors": [2.483080970877492e-07, 4.003847773116852e-07, NaN, NaN], "covariance": [[6.165691107933908e-14, 3.476124998133095e-31, 7.40018267161809e-11, 0.0], [0.0, 1.6030796990292778e-13, 7.662335210339054e-10, -8.207768090724518e-10], [2.0519420226811294e-10, 4.103884045362259e-10, -69021967835.83734, 129308198007.12993], [0.0, 0.0, 129308198007.12994, -242250555817.52777]]}