{"coeffs": [-0.15352836472910175, -7.616131074513507e-08, -0.5647240710111929, 0.0029551962450030216], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [NaN, 9.064465108791119e-08, 17849.09737969333, 4549.542871258665], "covariance": [[-2853838871003.8154, -2.3821884566321936e-08, -109269158412.62263, 5023646207.829988], [0.0, 8.21645277084916e-15, 2.4408753362839684e-11, -1.5255470851774802e-12], [-54929525993.54903, 1.8610847317439013e-10, 318590277.2697753, -127196122.7855114], [0.0, -4.652711829359753e-11, -223889214.94257826, 20698340.33742054]]}