Skip to main content

Table 6 Statistics for full mixed-effects models (best in boldface, worst in italics )

From: Evaluation of different approaches to individual tree growth and survival modelling using data collected at irregular intervals – a case study for Pinus patula in Kenya

  Modelling and simulation approach
Regression 1 Regression 2 Regression 2 Optimization
1-year step 1-year step true step 1-year step
Basal area     
- bias (m2 · ha–1) –1.09 1.43 1.10 0.25
- RMSE (m2 · ha–1) 4.28 3.99 4.20 2.27
Number of trees per hectare    
- bias –27.07 53.19 38.88 0.42
- RMSE 100.23 137.98 128.16 35.19
Annual basal area increment    
- bias (m2 · ha–1) –0.297 0.709 0.151 0.005
- bias (%) 22.16 52.91 11.27 0.37
- RMSE (m2 · ha–1) 0.942 1.345 0.890 0.729