{"coeffs": [-7.074872421242162e-08, 3.469951812104701e-09, -0.2937999427608646, 0.0004850580566009679], "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]]}