{"coeffs": [-2.9057530880614976e-07, -6.350813643704433e-09, -0.2576552061589538, 0.027113794931605917], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [3.020188123962243e-08, 1.8429162997547762e-08, 0.021336339300209558, 0.01856861877863112], "covariance": [[9.121536304122573e-16, -3.149871392346136e-17, 2.5206953333553263e-10, -2.1072238147261688e-10], [-3.149871392346134e-17, 3.396340487901836e-16, 8.796973167212553e-11, 8.262949749320625e-11], [2.520695333355327e-10, 8.796973167212552e-11, 0.0004552393747336669, -3.705725817546472e-05], [-2.1072238147261688e-10, 8.262949749320626e-11, -3.705725817546471e-05, 0.0003447936033461322]]}