{"coeffs": [-1.5028058086841156e-07, -1.6533534415626608e-08, -0.2536786677455983, 0.00047821987091109205], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.0225626749848326e-08, 1.3816732587042844e-08, NaN, NaN], "covariance": [[4.0907597742418013e-16, -4.9674359104495166e-33, 9.77418868721244e-12, -4.474287709858392e-12], [-8.693012843286654e-33, 1.9090209938185162e-16, 1.1729026424654929e-11, -3.66443129143732e-12], [9.52983397003213e-12, 8.796769818491197e-12, -7921647748.982811, 4615730105.373569], [-4.3983849092455985e-12, -2.9322566061637322e-12, 4615730105.373569, -2689461218.2658052]]}