{"coeffs": [-2.2717423112916552e-07, 3.2990501273626062e-09, -0.32128449235168277, 0.027295628317205983], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [3.998205731160173e-08, 1.8937982218820643e-08, 0.02969338314994393, 0.025603742534062477], "covariance": [[1.5985649068682056e-15, -4.874838680392686e-17, 5.489899248664004e-10, -4.5014902272811504e-10], [-4.874838680392682e-17, 3.586471705203669e-16, 1.1050609907946928e-10, 1.1230579402686981e-10], [5.489899248664003e-10, 1.1050609907946926e-10, 0.000881697002889374, -0.0001173895399313014], [-4.50149022728115e-10, 1.1230579402686982e-10, -0.00011738953993130135, 0.00065555163175056]]}