{"coeffs": [-1.125019058225918e-07, 1.1080618660714581e-08, -0.21378423796296514, 0.0006356222891244339], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [4.476150473962713e-08, 3.3836520396121787e-08, NaN, NaN], "covariance": [[2.0035923065556624e-15, 1.5817933178534047e-23, 3.282685620997224e-11, -5.08712380767682e-12], [1.5817933178534047e-23, 1.1449101125171659e-15, 8.753828322659265e-11, -1.8412768136208852e-11], [4.1033570262465305e-11, 8.206714052493061e-11, -148083199420.6457, 103346963669.3028], [-8.20671405249306e-12, -1.641342810498612e-11, 103346963669.3028, -72125635733.49632]]}