{"coeffs": [-1.0095123706064665e-07, -2.3172967168367593e-09, -0.3086560741770026, 0.014336657814598915], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.5655862113663425e-08, 1.406994464243331e-08, 0.038600995190090054, 0.027335426038717307], "covariance": [[6.582232607953102e-16, -6.214348354717284e-18, 3.4722838993192253e-10, -2.1740864045655747e-10], [-6.2143483547172755e-18, 1.9796334224113781e-16, 8.630021194173572e-11, 5.132532289193782e-11], [3.4722838993192253e-10, 8.630021194173572e-11, 0.0014900368296653554, -0.00022093215413766587], [-2.1740864045655747e-10, 5.1325322891937836e-11, -0.00022093215413766587, 0.0007472255167181841]]}