Selection of Tree-Size Variables for Appraisal Methods for Urban Trees According to Their Collinearity

Article Figures & Data

Table 1.

Summary of the descriptive statistics for each variable.

Variable	Average	Median	S.D.	Min	Max	VC
c (cm)	97.42	96.87	24.26	60.87	138.47	29.16
d (cm)	31.24	30.96	7.5	20.58	44.08	28.52
g (cm²)	1213.34	1155.46	492.69	619.47	2186.39	49.08
h (m)	9.41	7.54	1.12	5.98	13.6	13.48
cd (m)	5.62	5.60	1.15	3.98	7.76	19.17
ca (m²)	33.67	31.50	14.47	17.62	63.65	37.22

Note: Average = arithmetic mean of the variable in individuals; Median = divided values of the variable in two equal-sized sets; S.D. = standard deviation; Min = the lowest sample value; Max = the highest sample value; and VC = variation coefficient.

Table 2.

Canonical Correlations.

Function	Eigenvalue	Canonical corr.	Wilks λ	χ²	F.D.	P-value
1	0.718616	0.847712	0.280855	128.897	4	0.0000
2	0.001883	0.043397	0.998117	0.19134	1	0.6618
Coefficients for first canonical variable (U₁)
Variable	^F1	^F2
c	0.71638	1.48806
h	0.33089	−1.61803
Coefficients for second canonical variable (U₂)
Variable	^F1	^F2
ca	0.42432	1.08922
age	0.71205	−0.92705