Official Journal of the Japan Wood Research Society
Table 8 Fitting results by various model
Grade | Model | Calculation formula | r 2 | Std. error |
|---|---|---|---|---|
SS | Cubic | \( y = 0.215x^{3} - 1.828x^{2} + 6.450x - 2.275 \) | 0.999 | 0.150 |
Logarithm | \( y = 2.957 + 3.261\ln (x - 0.116) \) | 1000 | 0.015 | |
Allometric | \( y = 2.881x^{0.754} \) | 0.981 | 0.101 | |
No. 1 | Cubic | \( y = 0.228x^{3} - 1.933x^{2} + 6.779x - 2.572 \) | 0.999 | 0.163 |
Logarithm | \( y = 2.937 + 3.383\ln (x - 0.123) \) | 1.000 | 0.021 | |
Allometric | \( y = 2.848x^{0.781} \) | 0.979 | 0.108 | |
No. 2 | Cubic | \( y = 0.216x^{3} - 1.837x^{2} + 6.479x - 2.301 \) | 0.999 | 0.151 |
Logarithm | \( y = 2.955 + 3.271\ln (x - 0.117) \) | 1.000 | 0.016 | |
Allometric | \( y = 2.878x^{0.757} \) | 0.981 | 0.101 |