{"coeffs": [-9.60854536916321e-08, 3.7051865854281417e-09, -0.22409922034318353, 0.0005622820856390281], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [4.7566059223555374e-08, 3.595656312913004e-08, NaN, NaN], "covariance": [[2.262529990058777e-15, -1.8839346712348363e-31, 0.00024407368609308226, -1.5523962202624252e-05], [-8.359131843293995e-32, 1.2928744320591136e-15, 0.00015547987739463623, -5.933466480166521e-06], [0.00024407372316237369, 0.00023321981609195433, -3.782702330714296e+23, 2.4059345691250264e+22], [-1.5523962436627404e-05, -9.717492337164764e-06, 2.405934569125026e+22, -1.5302608148439124e+21]]}