Table 3 Parameterization of the three-parameter exponential model (H = a − be −cD) fitted by a nonlinear least-square estimation (NLS; local model) and the partial nonlinear mixed effects (NLME) local model with “site” as random effect (α and β; see Eq. 2), with three sites Yangambi, Yoko, and Yambela
From: Model performance of tree height-diameter relationships in the central Congo Basin
a (SE) | b (SE) | c (SE) | RSE | AIC | ||
|---|---|---|---|---|---|---|
Local model | 39.964 (1.664) | 36.852 (1.279) | 0.023 (0.002) | 4.979 | 3686 | |
NLME | Fixed | 39.092 (1.899) | 35.224 (1.994) | 0.023 (0.002) | 4.877 | 3673 |
Random | α | β | ||||
Yangambi | −2.252 | −2.357 | ||||
Yoko | 1.279 | 2.890 | ||||
Yambela | 0.973 | −0.533 | ||||