{"coeffs": [-4.755449912458579e-08, 5.664824043121449e-09, -0.2292278056879054, 0.00020291702035787857], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [4.0088875005873134e-08, 3.030433982063332e-08, NaN, NaN], "covariance": [[1.6071178992365199e-15, -8.36371521109414e-33, 0.00017360035510010532, -9.73674708178859e-06], [-5.52629085749622e-33, 9.183530119644223e-16, 0.0026505671518703647, -0.0001136360239158306], [0.00017360032876908638, 0.0030923283438487586, -3.900172639053496e+25, 2.1874954694099582e+24], [-9.73674671367416e-06, -0.00013805037249324815, 2.1874954694099585e+24, -1.2269037479967458e+23]]}