Official Journal of the Japan Wood Research Society
Table 1 Variables calculated from knot and pith measurements on each sample board
Variable no. | Variable description | Variable unit |
|---|---|---|
1 | Number of knots | [] |
2 | Number of sound knots | [] |
3 | Number of black knots | [] |
4 | Simpson index of knot type | [] |
5 | Mean knot size | mm2 |
6 | Mean sound knot size | mm2 |
7 | Mean black knot size | mm2 |
8 | Standard deviation of knot size | mm2 |
9 | Standard deviation of sound knot size | mm2 |
10 | Standard deviation of black knot size | mm2 |
11 | Median of knot size | mm2 |
12 | Median of sound knot size | mm2 |
13 | Median of black knot size | mm2 |
14 | Minimum knot size | mm2 |
15 | Minimum sound knot size | mm2 |
16 | Minimum black knot size | mm2 |
17 | Maximum knot size | mm2 |
18 | Maximum sound knot size | mm2 |
19 | Maximum black knot size | mm2 |
20 | Relative total knot area | mm2/mm2 |
21 | Relative total sound knot area | mm2/mm2 |
22 | Relative total black knot area | mm2/mm2 |
23 | Mean knot elongation | mm/mm |
24 | Standard deviation of knot elongation | mm/mm |
25 | Minimum knot elongation | mm/mm |
26 | Maximum knot elongation | mm/mm |
27 | Mean Euclidean distance to first nearest neighbour | mm |
28 | Standard deviation of longitudinal knot position | mm |
29 | Span of longitudinal knot position | mm |
30 | Length sum of pith | mm |