Table 4 Loadings, eigenvalues, and variance, percentage for PCA.
From: Strength characterization of limestone lithofacies under different moisture states
Natural | Dry | Saturated | ||||
|---|---|---|---|---|---|---|
PC1 | PC2 | PC1 | PC2 | PC1 | PC2 | |
Eigenvalue | 4.749 | 2.306 | 4.872 | 2.300 | 4.647 | 2.624 |
Variance (%) | 39.57 | 19.21 | 40.60 | 19.16 | 38.73 | 21.87 |
CaO | – 0.4463 | – 0.0540 | – 0.4419 | 0.0126 | – 0.4516 | – 0.0618 |
SiO2 | 0.4223 | – 0.0923 | 0.4137 | – 0.1695 | 0.4272 | – 0.0623 |
MgO | 0.1416 | 0.4722 | 0.1618 | 0.5486 | 0.1436 | 0.4644 |
Al2O3 | 0.4189 | – 0.1160 | 0.3978 | – 0.2103 | 0.4230 | – 0.1762 |
Fe2O3 | 0.4286 | – 0.1028 | 0.4115 | – 0.1917 | 0.4328 | – 0.1454 |
Na2O3 | – 0.0887 | 0.0739 | – 0.0908 | – 0.1296 | – 0.0848 | 0.0663 |
P2O5 | 0.1938 | -0.0432 | 0.1837 | – 0.0306 | 0.1881 | – 0.0970 |
SO3 | 0.2504 | 0.0850 | 0.2577 | – 0.1920 | 0.2718 | – 0.0183 |
Cl | 0.3220 | 0.2960 | 0.3292 | 0.3335 | 0.3264 | 0.2516 |
UCS | – 0.1738 | 0.2635 | 0.2220 | 0.0352 | – 0.0236 | 0.5707 |
PLI | 0.0024 | 0.5778 | 0.1017 | 0.6093 | 0.0329 | 0.4696 |
ITS | -0.0342 | 0.4860 | 0.0583 | 0.2257 | 0.0449 | 0.3175 |
