{"coeffs": [7.624999713288565e-08, -3.961008273025908e-09, 0.6136396440692954, 0.0020346403577376727], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [1.4374022539869398e-08, 1.0865739374366852e-08, NaN, NaN], "covariance": [[2.066125239766735e-16, 0.0, 1.6248670170953483e-10, 9.794848004018362e-11], [-2.8673247883053677e-33, 1.1806429215166612e-16, -5.077709428422963e-12, -7.97832744916011e-13], [1.0832446780635655e-10, -8.462849047371605e-12, -280196162166.20276, -127886959010.85756], [8.124335085476741e-11, -2.5388547142114816e-12, -127886959010.85753, -58370086722.82771]]}