Annals of Forest Science

Table 4 Evaluation of SVMs based on different kernel types

From: Analysis of plot-level volume increment models developed from machine learning methods applied to an uneven-aged mixed forest

Kernel type	Linear		Polynomial		RBF Gamma		Sigmoid
Kernel type	Train	Evaluation	Train	Evaluation	Train	Evaluation	Train	Evaluation
R²	0.90	0.86	0.89	0.85	0.91	0.92	0.39	0.41
RMSE	0.45	0.52	0.44	0.48	0.3	0.33	0.80	0.83
BIAS	0.092	0.097	0.19	0.099	0.063	0.061	2.23	2.31
%RMSE	28.08	23.83	18.55	22.06	12.44	14.93	33.45	37.41
%BIAS	3.81	4.36	7.88	4.45	2.61	2.74	92.53	104.05
Gamma	-		0.14		0.14		0.14
Epsilon	0.1		0.1		0.1		0.1
Capacity	10		10		10		10

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ISSN: 1297-966X

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