{"coeffs": [-5.428510785054955e-08, -1.230223486804631e-09, -0.3381462722526404, 0.0018418879509628562], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [1.1421933294620128e-08, 6.194413100520931e-09, 184989.9863236967, 136411.39691502578], "covariance": [[1.304605601867518e-16, 2.1216843505443994e-34, -5.343664567594625e-12, -1.598971421695238e-11], [0.0, 3.837075365990533e-17, -6.679580709493282e-13, -1.4056732832042965e-12], [5.343664567594625e-12, 0.0, 34221295040.041496, 25234742449.70697], [-1.068732913518925e-11, -1.0019371064239923e-12, 25234742449.706974, 18608069208.3087]]}