{"coeffs": [-1.980219552779127e-07, -3.7033672712858054e-09, -0.2898045208191186, 0.001232025900913465], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.9948712976204605e-08, 1.834079006007205e-08, 503603.93473293487, 206698.86672497925], "covariance": [[8.969254089310862e-16, 6.772946559728841e-26, 1.7634270947016025e-10, 3.619523621181183e-11], [3.915594725571131e-26, 3.363845800276377e-16, 9.740884300925538e-05, 3.9980420073476004e-05], [8.817135473508012e-11, 9.74088374985457e-05, 253616923078.49414, 104094362587.53807], [2.204283868377003e-11, 3.998041840223602e-05, 104094362587.53804, 42724421505.39074]]}