{"coeffs": [-3.1423976059386376e-07, 1.88846848002405e-08, -0.3566027979131359, 0.0006000031371730071], "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]]}