{"coeffs": [-3.4658819871825065e-07, -1.693165670395982e-08, -0.2941135799287567, 0.02437287784485858], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [7.942543880503041e-08, 4.319142352196956e-08, 0.042506575492178914, 0.037316637353741605], "covariance": [[6.308400329371631e-15, -1.841302343279407e-16, 1.3537349929753703e-09, -1.1359137265090494e-09], [-1.8413023432794073e-16, 1.8654990658541453e-15, 3.7113091857967475e-10, 3.5800686661046345e-10], [1.3537349929753705e-09, 3.7113091857967475e-10, 0.0018068089600723049, -0.00017251592844418363], [-1.1359137265090494e-09, 3.5800686661046345e-10, -0.00017251592844418366, 0.0013925314233906635]]}