Prediction of Lard in Palm Olein Oil Using Simple Linear Regression (SLR), Multiple Linear Regression (MLR), and Partial Least Squares Regression (PLSR) Based on Fourier-Transform Infrared (FTIR)

Table 2

%RMSE of prediction according to spectral regions and training/test sets using various regression models.

Spectral region (peak max) in wavenumber (cm^−1)	%RMSE
	PLS		SLR		MLR
	Training	Test	Training	Test	Training	Test
1130–1100 (1117)	12.19	13.26	167.69	174.86	12.05	14.84
1190–1130 (1159)	18.28	20.09	225.32	248.25	839.59	863.52
1260–1210 (1236)	30.52	33.91	113.88	119.19	39.75	46.43
2870–2820 (2852)	43.28	51.05	110.33	119.28	117.96	128.69
3020–2990 (3006)	15.71	16.03	126.63	148.74	12.51	21.07