{"coeffs": [-4.986779056214889e-07, -2.3974122325717096e-08, -0.32517068642070635, 0.03498915656859987], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [3.594195696274902e-08, 1.5251880307694454e-08, 0.013801411967846029, 0.011835394268856762], "covariance": [[1.291824270312103e-15, -5.1373823108568174e-17, 2.735302295296924e-10, -2.2548960600739888e-10], [-5.1373823108568174e-17, 2.326198529202379e-16, 4.0147628524694414e-11, 4.852494383635013e-11], [2.735302295296924e-10, 4.014762852469441e-11, 0.0001904789723062036, -3.8946381121670264e-05], [-2.2548960600739888e-10, 4.852494383635014e-11, -3.894638112167025e-05, 0.0001400765574992875]]}