{"coeffs": [-6.088156566258976e-07, -3.630323513732515e-08, -0.22088603618119015, 0.03645825952852774], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [5.9382576590037904e-08, 4.036159231316692e-08, 0.02563085576306675, 0.022252500357946254], "covariance": [[3.526290402471718e-15, -1.9039429416064735e-16, 6.371174968106732e-10, -5.495185998717095e-10], [-1.9039429416064725e-16, 1.6290581340542946e-15, 2.7506370084765454e-10, 2.695563589211278e-10], [6.371174968106733e-10, 2.7506370084765454e-10, 0.000656940767147132, -5.312918556228866e-05], [-5.495185998717094e-10, 2.695563589211278e-10, -5.312918556228866e-05, 0.0004951737721803982]]}