Table 1.

Overall estimation results for each subject.

	Lasso						SVR
	RMSE(°)		NRMSE		R 2		RMSE(°)		NRMSE		R 2
Subjects	S	$\stackrel{-}{S}$	S	$\stackrel{-}{S}$	S	$\stackrel{-}{S}$	S	$\stackrel{-}{S}$	S	$\stackrel{-}{S}$	S	$\stackrel{-}{S}$
Subject 1	6.31	5.33	0.051	0.044	0.93	0.95	5.22	5.82	0.043	0.047	0.95	0.94
Subject 2	6.67	6.83	0.059	0.060	0.89	0.89	6.25	5.61	0.057	0.052	0.90	0.91
Subject 3	7.26	6.02	0.064	0.054	0.87	0.91	7.18	7.40	0.063	0.064	0.88	0.88
Subject 4	8.82	7.99	0.068	0.061	0.83	0.86	8.44	9.32	0.064	0.071	0.85	0.82
Subject 5	6.05	6.15	0.037	0.037	0.96	0.97	6.94	6.39	0.047	0.039	0.93	0.96
Subject 6	10.30	9.13	0.066	0.055	0.90	0.94	9.71	8.80	0.060	0.053	0.93	0.95
Subject 7	7.80	7.07	0.056	0.051	0.92	0.93	7.30	8.02	0.051	0.059	0.93	0.90
Subject 8	9.58	8.70	0.077	0.068	0.80	0.85	9.42	8.27	0.075	0.065	0.81	0.86
Subject 9	7.20	6.72	0.055	0.049	0.92	0.94	7.09	7.36	0.054	0.053	0.92	0.93
Subject 10	7.41	6.68	0.057	0.051	0.94	0.95	6.89	6.76	0.054	0.053	0.94	0.94
Subject 11	7.01	7.47	0.052	0.053	0.92	0.92	6.54	8.72	0.049	0.060	0.93	0.89
Subject 12	11.31	13.35	0.054	0.049	0.94	0.95	8.28	10.65	0.042	0.048	0.96	0.95
AVE	7.98	7.62	0.058	0.053	0.90	0.92	7.44	7.76	0.055	0.055	0.91	0.91
STD	1.66	2.11	0.010	0.008	0.05	0.04	1.30	1.50	0.010	0.009	0.04	0.04