{"coeffs": [-3.670124021394259e-07, -1.8425251799356184e-08, -0.2669446664859944, 0.02297100671856138], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [3.0662565737355004e-08, 1.901781983395727e-08, 0.016437299892444572, 0.014435541124545424], "covariance": [[9.401929375976169e-16, -2.716253057714494e-17, 1.818340047844213e-10, -1.5241112815583007e-10], [-2.7162530577144953e-17, 3.616774712368585e-16, 6.510715266121002e-11, 5.976677195710973e-11], [1.818340047844213e-10, 6.510715266121003e-11, 0.0002701848277541584, -2.1381395825487388e-05], [-1.5241112815583007e-10, 5.976677195710973e-11, -2.1381395825487388e-05, 0.00020838484755844215]]}