. 2020 Nov 27;7(4):045009. doi: 10.1117/1.NPh.7.4.045009

Table 1.

Root mean squared error. Mean ( $μ$ ) $\pm$ standard deviations ( $σ$ ) across replications are indicated.

Train	Test	Multiquadratic	Inv. multiquadratic	Gaussian	Marten
${HbO}_{2}$
70%	30%	$3.24 e - 4 \pm 6.35 e - 8$	$6.16 e - 4 \pm 2.96 e - 7$	$7.12 e - 02 \pm 3.31 e - 02$	$2.27 e - 4 \pm 3.30 e - 8$
60%	40%	$1.22 e - 4 \pm 2.21 e - 8$	$8.84 e - 5 \pm 7.41 e - 9$	$6.37 e - 03 \pm 1.02 e - 4$	$6.34 e - 5 \pm 2.83 e - 9$
40%	60%	$9.14 e - 5 \pm 6.26 e - 9$	$6.75 e - 4 \pm 1.01 e - 6$	$3.58 e - 03 \pm 1.14 e - 5$	$1.38 e - 4 \pm 1.27 e - 8$
20%	80%	$3.62 e - 5 \pm 1.03 e - 9$	$1.01 e - 4 \pm 2.43 e - 8$	$1.73 e - 03 \pm 7.76 e - 7$	$7.70 e - 5 \pm 4.14 e - 9$
Average		$1.43 e - 4 \pm 2.32 e - 8$	$3.70 e - 4 \pm 3.52 e - 7$	$2.70 e - 02 \pm 8.30 e - 03$	$1.26 e - 4 \pm 1.32 e - 8$
HbR
70%	30%	$6.31 e - 7 \pm 1.82 e - 13$	$2.16 e - 6 \pm 5.50 e - 12$	$4.01 e - 02 \pm 1.76 e - 9$	$7.66 e - 7 \pm 2.20 e - 13$
60%	40%	$4.18 e - 7 \pm 3.60 e - 13$	$4.01 e - 6 \pm 1.19 e - 10$	$5.68 e - 5 \pm 9.18 e - 9$	$3.09 e - 7 \pm 8.44 e - 14$
40%	60%	$5.64 e - 7 \pm 4.75 e - 13$	$5.91 e - 7 \pm 3.16 e - 13$	$2.32 e - 5 \pm 1.17 e - 9$	$5.30 e - 7 \pm 2.95 e - 13$
20%	80%	$1.05 e - 7 \pm 1.04 e - 14$	$6.97 e - 7 \pm 7.13 e - 13$	$4.59 e - 6 \pm 4.40 e - 12$	$2.59 e - 7 \pm 4.90 e - 14$
Average		$4.30 e - 7 \pm 2.50 e - 13$	$1.87 e - 6 \pm 3.15 e - 11$	$3.12 e - 5 \pm 3.03 e - 9$	$4.66 e - 7 \pm 1.62 e - 13$