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

Table 5 Results and evaluation related to analysis of k-nearest neighbor

KNN	Euclidean		Euclidean squared		Manhattan		Chebychev
KNN	Train	Evaluation	Train	Evaluation	Train	Evaluation	Train	Evaluation
K range	1–20	1–20	1–20	1–20	1–20	1–20	1–20	1–20
R²	0.71	0.73	0.71	0.73	0.73	0.75	0.71	0.72
RMSE	0.95	0.81	0.95	0.81	0.84	0.78	0.95	0.82
BIAS	0.06	0.14	0.06	0.14	0.03	0.04	0.05	0.13
%RMSE	39.52	36.63	39.52	36.63	35.24	36.51	39.62	36.64
%BIAS	0.27	6.31	0.27	6.31	0.25	2.22	0.26	6.12
Optimal K	10	10	10	10	11	11	10	10

ISSN: 1297-966X