{"coeffs": [-3.9178693033244177e-07, 0.0008611038075140404, 6.260493426332825, 0.8784781669907687], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 9.9999999999999995e-07, "errors": [3.094824178361468e-06, 2.548089221681792, 2640.1086397858103, 5.759967065388482], "covariance": [[9.577936694970737e-12, -7.864897164900422e-06, -0.008149195518002554, -1.781403338212058e-05], [-7.864897203749657e-06, 6.492758681650921, 6727.231657719959, 14.667223723163751], [-0.00814919555800146, 6727.231657510064, 6970173.62987168, 15197.155174280788], [-1.781403342608497e-05, 14.667223687006503, 15197.155137291953, 33.17722059436]]}