{"coeffs": [-1.533095649125022e-07, 2.0254921935379624e-05, 0.5739082865122811, 0.09285803453446348], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [7.496615512058328e-08, 8.188183579319426e-07, 0.008315659537331087, 0.003920760860319256], "covariance": [[5.619924413563356e-15, -3.08757630942648e-14, -2.624060738358771e-10, -1.9608559128911222e-10], [-3.087576309426478e-14, 6.704635032863629e-13, 6.70445724160301e-09, 2.923470404899911e-09], [-2.6240607383587695e-10, 6.70445724160301e-09, 6.915019354080548e-05, 2.8980572746792343e-05], [-1.960855912891121e-10, 2.923470404899911e-09, 2.8980572746792343e-05, 1.5372365723811388e-05]]}