{"coeffs": [-5.169935733560062e-07, -7.118472085349591e-09, -0.2735969782088061, 0.023494691396603484], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [3.893781910038697e-08, 2.2995858893750653e-08, 0.01406764292144133, 0.011968049040548458], "covariance": [[1.5161537562944603e-15, -4.068869238988669e-17, 2.0499274630828187e-10, -1.6295354954691465e-10], [-4.0688692389886687e-17, 5.288095262612911e-16, 6.800371321576802e-11, 5.980960524707011e-11], [2.0499274630828184e-10, 6.800371321576802e-11, 0.00019789857736517833, -1.4083107935093735e-05], [-1.6295354954691462e-10, 5.980960524707012e-11, -1.4083107935093733e-05, 0.00014323419783697286]]}