{"coeffs": [-2.640135842367918e-07, 7.415605441821262e-09, -0.22097235892906122, 0.022416307767368457], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [3.053410721602447e-08, 2.1393238650016318e-08, 0.022447166593000074, 0.019668611626044653], "covariance": [[9.323317034796775e-16, -2.789261561351557e-17, 2.2665325574316852e-10, -1.8959909972819894e-10], [-2.789261561351558e-17, 4.57670659936552e-16, 1.0463175056000189e-10, 9.269755187132215e-11], [2.2665325574316852e-10, 1.0463175056000188e-10, 0.0005038752880538985, -3.113760860160634e-05], [-1.8959909972819894e-10, 9.269755187132214e-11, -3.1137608601606343e-05, 0.0003868542832961789]]}