{"coeffs": [-0.14092172592510566, 1.3645012024357194e-07, 0.282471700538523, 0.00669603562444478], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [NaN, 1.6280525295850407e-08, 8.271751879701103, NaN], "covariance": [[-1986769012025.3818, 4.502215920045923e-07, 759.0242152891688, -7252283315.29017], [7.203174551262806e-07, 2.6505550390882495e-16, 4.060407029325264e-08, -5.027274278855576e-10], [1214.080323506954, 4.0604070293269164e-08, 68.42187915933873, -0.8467886170787957], [-7252283350.396326, -1.4872600572494222e-09, -2.5078754241142867, -26472937.927072514]]}