. Author manuscript; available in PMC: 2022 Aug 1.

Published in final edited form as: IEEE Trans Biomed Eng. 2021 Jul 16;68(8):2389–2399. doi: 10.1109/TBME.2020.3039404

TABLE II:

Root-mean-square error (RMSE) and coefficient of determination (R²) for the sigmoid fit in the Anterior/Posterior, Medial/Lateral, and Superior/Inferior directions. Subject specific R² values below 0.75 are bolded for discussion.

Subject	Force Direction
	Anterior/Posteror		Medial/Lateral		Superior/Inferior
	R2	RSME (N)	R2	RSME (N)	R2	RSME (N)
S1	0.96	1.34	0.95	1.54	0.64	5.48
S2	0.87	3.68	0.75	3.3	0.3	7.35
S3	0.39	5.85	0.80	2.68	0.37	7
S4	0.9	3.74	0.93	2.37	0.82	4.15
Mean	0.83	3.68	0.85	2.55	0.44	6.56