{"coeffs": [-2.6980901042083614e-08, 6.230735284708404e-06, 0.5575144709892825, 0.1310922193223925], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [8.568011430750202e-08, 7.169364068808673e-07, 0.03087109994258626, 0.015460186311625018], "covariance": [[7.341081987746612e-15, -4.1756783094279596e-14, -1.594782159242176e-09, -1.1004788833750397e-09], [-4.175678309427958e-14, 5.139978115112484e-13, 2.1890824330664577e-08, 1.0342998219950271e-08], [-1.5947821592421767e-09, 2.1890824330664577e-08, 0.0009530248116651494, 0.00043298208924507915], [-1.1004788833750397e-09, 1.0342998219950271e-08, 0.00043298208924507904, 0.0002390173607901576]]}