{"coeffs": [-3.150973500444131e-07, 6.298718820550793e-09, -0.3384054734542525, 0.0389008820847663], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.867399929846625e-08, 1.0641303575376473e-08, 0.015964187815069846, 0.013543981929540008], "covariance": [[8.221982357684429e-16, -3.482486171589254e-17, 2.836735411069766e-10, -2.2980511795311671e-10], [-3.4824861715892546e-17, 1.1323734178332012e-16, 2.8573202519122673e-11, 4.123290933097004e-11], [2.836735411069766e-10, 2.8573202519122673e-11, 0.0002548552925948246, -6.783911370264315e-05], [-2.2980511795311671e-10, 4.123290933097003e-11, -6.783911370264315e-05, 0.00018343944650770625]]}