. 2022 Feb 18;22(4):1609. doi: 10.3390/s22041609

Table 2.

Curve-fitting of Figure 4, Figure 5 and Figure 6. The degree of convergence of the pitch consistency analogous to the goodness of fit (R²) may suggest fixation quality.

Nonlinear Regression	Peak Energy
Figure	4a	4b	4c	4d
Exp. eqn. best-fit values	$y = 1044 e^{- 0.0826 x}$	$y = 2041 e^{- 0.1519 x}$	$y = 624.1 e^{- 0.1009 x}$	$y = 192.6 e^{- 0.04061 x}$
R²	0.3103	0.7783	0.6959	0.2554
Figure	5a	5b	5c	5d
Exp. eqn. best-fit values	$y = 486.7 e^{- 0.01864 x}$	$y = 491.6 e^{- 0.1399 x}$	$y = 813.7 e^{- 0.02262 x}$	$y = 83.88 e^{0.02983 x}$
R²	0.1199	0.5147	0.1979	0.1682
Figure	6a	6b	6c	6d
Exp. eqn. best-fit values	$y = 285.7 e^{0.001743 x}$	$y = 505.9 e^{- 0.06232 x}$	$y = 393.7 e^{- 0.07446 x}$	$y = 145.3 e^{- 0.0145 x}$
R²	0.0001	0.4357	0.3550	0.0201