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. 2012 Apr 24;7(4):e34592. doi: 10.1371/journal.pone.0034592

Table 3. Principal components analysis results, indicating the weight of each variable on each PC axis as well as the eigenvalue and % of the variance accounted for by each axis.

PC Axis
Variable 1 2 3 4
Nest Size −0.567 0.504 −0.458 0.331
Prey Capture Web Size −0.622 0.510 −0.401 0.288
Distance From Forest Edge −0.647 −0.042 0.149 −0.468
Canopy Cover −0.677 −0.224 0.416 0.206
Forest Height −0.829 −0.191 0.181 −0.116
Height Above Ground 0.160 −0.688 −0.522 0.074
DBH (Ord.L) −0.352 −0.593 −0.145 0.297
DBH (Ord.Q) 0.107 0.142 0.507 0.462
Location on Plant (Ord. L) −0.381 −0.350 −0.275 −0.310
Location on Plant (Ord. Q) 0.098 0.357 −0.291 −0.473
Instar (Ord.L) −0.309 0.149 0.284 −0.319
Instar (Ord.Q) 0.123 0.247 0.073 −0.165
Eigenvalue 2.7 1.8 1.4 1.2
% Variance 22.5 15 12 10

The ordinal variables (DBH, location on plant, and instar) are converted to polynomials in this function, and the contribution of both components is shown.