Global Optimization of Redescending Robust Estimators

Table 2

Defining parameters (a and b) of lines y = ax + b fitted to the data obtained with different redescending estimators computed by GO and by IRLS and corresponding best values of the objective function f.

	Geman–McClure		Welsch		Tukey
	IRLS	GO	IRLS	GO	IRLS	GO
a	−0.06036	0.22425	−0.06338	0.49127	−0.06766	0.48653
b	47.3326	−48.6879	49.8820	−133.7073	52.2803	−131.4851
fbest	14.245	13.009	23.755	20.899	26.353	24.530