{"coeffs": [-4.067230510616218e-07, -1.0771407845830902e-08, -0.16221805756164867, 0.05099283769808699], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.624439580820584e-08, 2.029482278667872e-08, 0.020375843454119084, 0.017882967032308565], "covariance": [[6.887683113377723e-16, -6.702067462453396e-17, 2.4002343562567597e-10, -2.2477924764118878e-10], [-6.702067462453396e-17, 4.118798319426938e-16, 1.3319810629466554e-10, 1.43167775147199e-10], [2.4002343562567597e-10, 1.3319810629466554e-10, 0.00041517499646676753, -3.157633645957331e-05], [-2.2477924764118875e-10, 1.4316777514719898e-10, -3.1576336459573294e-05, 0.00031980050987863505]]}