Table 2. A stepwise cross-correlation for the k-nearest neighbor estimation to assess the accuracy of the parameter estimations.

   
Root mean square error
Value of k  
1
 
2
 
3
 
4
 
5
 
6
 
7
 
8
 
9
 
10
Pine (%)  
38.924
 
34.027
 
31.05
 
29.854
 
29.313
 
28.813
 
28.629
 
28.271
 
28.2
 
28.032
Spruce (%)  
25.16
 
21.929
 
20.615
 
19.926
 
19.31
 
19.183
 
18.959
 
18.698
 
18.611
 
18.753
Deciduous (%)  
17.136
 
12.927
 
12.83
 
12.664
 
13.185
 
13.109
 
13.19
 
13.086
 
13.008
 
13.157
Height (dm)  
71.008
 
62.204
 
58.021
 
57.171
 
57.239
 
56.344
 
55.939
 
55.517
 
55.925
 
55.959
Basal area (0.1 m2/ha)  
91.437
 
81.731
 
74.725
 
71.544
 
70.237
 
70.756
 
70.596
 
70.302
 
70.015
 
69.409
Basal area of dead trees (0.01 m2/ha)  
168.283
 
148.6
 
138.643
 
136.242
 
134.602
 
133.52
 
130.831
 
130.084
 
130.884
 
130.144
   
Bias
Value of k  
1
 
2
 
3
 
4
 
5
 
6
 
7
 
8
 
9
 
10
Pine (%)  
-0.127
 
-0.042
 
-0.072
 
0.766
 
0.751
 
0.597
 
0.888
 
0.777
 
0.764
 
0.955
Spruce (%)  
1.38
 
1.491
 
1.566
 
1.281
 
1.307
 
1.488
 
1.449
 
1.535
 
1.61
 
1.598
Deciduous (%)  
-0.535
 
-0.213
 
-0.287
 
-0.753
 
-0.97
 
-0.842
 
-0.965
 
-1.05
 
-1.018
 
-1.071
Height (dm)  
-0.965
 
0.134
 
1.176
 
1.79
 
0.678
 
1.03
 
2.012
 
2.814
 
2.397
 
2.988
Basal area (0.1 m2/ha)  
-3.162
 
-0.686
 
2.947
 
2.604
 
2.478
 
3.515
 
4.269
 
4.53
 
4.892
 
5.644
Basal area of dead trees (0.01 m2/ha)  
-7.845
 
-6.574
 
-0.044
 
-0.938
 
0.488
 
0.64
 
-0.482
 
-0.252
 
0.129
 
0.873
   
Standard deviation of bias
Value of k  
1
 
2
 
3
 
4
 
5
 
6
 
7
 
8
 
9
 
10
Pine (%)  
3.266
 
2.856
 
2.606
 
2.505
 
2.46
 
2.418
 
2.402
 
2.372
 
2.366
 
2.352
Spruce (%)  
2.111
 
1.84
 
1.73
 
1.672
 
1.62
 
1.61
 
1.591
 
1.569
 
1.562
 
1.574
Deciduous (%)  
1.438
 
1.085
 
1.077
 
1.063
 
1.106
 
1.1
 
1.107
 
1.098
 
1.092
 
1.104
Height (dm)  
5.959
 
5.22
 
4.869
 
4.798
 
4.803
 
4.728
 
4.694
 
4.659
 
4.693
 
4.696
Basal area (0.1 m2/ha)  
7.673
 
6.859
 
6.271
 
6.004
 
5.894
 
5.938
 
5.924
 
5.9
 
5.876
 
5.825
Basal area of dead trees (0.01 m2/ha)  
14.122
 
12.47
 
11.635
 
11.433
 
11.296
 
11.205
 
10.979
 
10.916
 
10.984
 
10.921
   
Mean values of estimates
Value of k  
1
 
2
 
3
 
4
 
5
 
6
 
7
 
8
 
9
 
10
Pine (%)  
55.901
 
55.986
 
55.957
 
56.794
 
56.779
 
56.625
 
56.916
 
56.805
 
56.792
 
56.983
Spruce (%)  
25.528
 
25.639
 
25.714
 
25.429
 
25.455
 
25.636
 
25.597
 
25.683
 
25.758
 
25.746
Deciduous (%)  
12.951
 
13.273
 
13.199
 
12.733
 
12.516
 
12.644
 
12.521
 
12.435
 
12.468
 
12.415
Height (dm)  
98.423
 
99.521
 
100.563
 
101.177
 
100.066
 
100.418
 
101.399
 
102.201
 
101.784
 
102.375
Basal area (0.1 m2/ha)  
188.859
 
191.335
 
194.969
 
194.626
 
194.5
 
195.536
 
196.29
 
196.551
 
196.913
 
197.665
Basal area of dead trees (0.01 m2/ha)  
129.93
 
131.2
 
137.731
 
136.836
 
138.262
 
138.414
 
137.292
 
137.523
 
137.903
 
138.647