{"coeffs": [-1.1037389304241944e-06, -3.2835504045669215e-08, -0.19883843539954116, 0.07042512949796384], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [5.8050291361096634e-08, 3.6318877441293114e-08, 0.01683050261954512, 0.01508338609373933], "covariance": [[3.3698363271082105e-15, -4.635535203731161e-16, 5.662611268664718e-10, -5.510310295488843e-10], [-4.635535203731161e-16, 1.31906085859567e-15, 1.6944953114803401e-10, 2.6692426586069013e-10], [5.662611268664716e-10, 1.6944953114803401e-10, 0.00028326581842651514, -5.502448069240539e-05], [-5.510310295488842e-10, 2.6692426586069013e-10, -5.502448069240539e-05, 0.000227508536052809]]}