{"coeffs": [-1.2541831113848246e-07, -7.212061144143055e-10, -0.3474887740956907, 0.018865571828752106], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.8436747413142094e-08, 1.3377065383054804e-08, 0.03200604520350499, 0.028890009013576048], "covariance": [[8.086486034388437e-16, -1.724155027237054e-17, 3.710142495824645e-10, -3.213186097305627e-10], [-1.7241550272370537e-17, 1.7894587826252316e-16, 6.881359721304494e-11, 6.918483044242992e-11], [3.7101424958246456e-10, 6.881359721304494e-11, 0.0010243869295688047, -0.00016313014741685947], [-3.213186097305627e-10, 6.918483044242992e-11, -0.00016313014741685945, 0.0008346326208045053]]}