Official Journal of the Japan Wood Research Society
Table 2 Statistical summary of the discriminant models based on the calibration and prediction sets obtained from a mixture of sapwood and heartwood samples (a and b), and individual sapwood (c and d) and heartwood (e and f) samples. The discriminant models were obtained by using the original spectra (a, c and e) and the second derivative spectra (b, d and f). A schematic illustration is shown on the left to indicate each spectral region
