{"coeffs": [-3.681311357920092e-07, -1.316231504985192e-08, -0.17372427018531114, 0.0005659799798054784], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [Infinity, Infinity, Infinity, Infinity], "covariance": [[Infinity, Infinity, Infinity, Infinity], [Infinity, Infinity, Infinity, Infinity], [Infinity, Infinity, Infinity, Infinity], [Infinity, Infinity, Infinity, Infinity]]}