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Forest Ecosystems
Fig. 3 | Forest Ecosystems

Fig. 3

From: Longitudinal height-diameter curves for Norway spruce, Scots pine and silver birch in Norway based on shape constraint additive regression models

Fig. 3

AIC values of the glmm (Eq. 2.2) used in the iterative search for the optimal parameter combination of λ and C and for spruce, pine, and birch. Each dotted line represents outcomes for a constant value of λ, which vary between 3 and 20 upwards (increment = 1). The parameter C was varied between 0.3 and 2.5 (increment = 0.1). The large black circles mark the parameter combination with the species specific minimum AIC-values. The black diamonds mark the AIC-values which would result if the optima determined by Mehtätalo (2004, 2005) in Finland would be applied

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