主成分 | Cd | Cr | Cu | Ni | Pb | Zn | 特征值 | 方差贡献率/% | 累计方差贡献率/% |
PC1 | 0.070 | 0.906 | 0.596 | 0.906 | 0.315 | 0.073 | 2.874 | 47.90 | 47.90 |
PC2 | 0.059 | 0.127 | 0.484 | 0.174 | 0.817 | 0.888 | 1.017 | 16.95 | 64.85 |
PC3 | 0.995 | −0.004 | 0.039 | 0.122 | 0.078 | 0.019 | 0.967 | 16.12 | 80.97 |