{"coeffs": [-1.471317033240003e-07, -2.1858210817375876e-09, -0.2911082789196725, 0.010358410429038418], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.974366990112356e-08, 1.7908654002900414e-08, 0.021752517872280785, 0.04677365186940546], "covariance": [[8.846858991870036e-16, -2.541681658983316e-17, 9.581627065950588e-11, -3.5360686484795477e-10], [-2.541681658983316e-17, 3.2071988819560106e-16, 7.246659745911103e-11, 1.719210638175717e-10], [9.581627065950588e-11, 7.246659745911104e-11, 0.0004731720337838949, 0.00030255910932166884], [-3.536068648479548e-10, 1.719210638175717e-10, 0.0003025591093216688, 0.0021877745092003364]]}