{"coeffs": [-3.2505487566585796e-08, 1.0694786805051747e-09, -0.2685041317295387, 0.0003034021606260581], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.4568707591828666e-08, 1.6783619291223702e-08, NaN, NaN], "covariance": [[6.036213927327795e-16, 2.5196233120695528e-33, -3.6090951463251274e-05, 1.8330263253309815e-06], [2.578242550041271e-33, 2.8168987651273646e-16, 0.0002903638185358189, 3.5014558557281967e-06], [-3.6090951463251274e-05, 0.0002903638185358189, -2.8309477648240285e+25, 1.4378119877011387e+24], [1.8330261865765427e-06, 9.07386932924434e-06, 1.4378119877011387e+24, -7.302513093545555e+22]]}