Coefficients of the Linear Combinations Expressing First and Second Principal Components, and First SIR Direction
| Pairing_freq | PCA1 | PCA2 | SIR1 |
| faa_200 | −0.154958 | −0.475658 | 0.111993 |
| fac_200 | 0.000931 | −0.033166 | −0.113294 |
| fag_200 | −0.006815 | −0.080282 | −0.441445 |
| fat_200 | 0.002420 | −0.053753 | −0.088708 |
| fca_200 | −0.000446 | −0.004373 | 0.239844 |
| fcc_200 | −0.265820 | 0.577022 | 0.238753 |
| fcg_200 | −0.004137 | 0.018679 | 0.269244 |
| fct_200 | −0.012399 | −0.009786 | −0.096109 |
| fga_200 | −0.014155 | −0.014012 | −0.034745 |
| fgc_200 | −0.006835 | 0.021381 | 0.332223 |
| fgg_200 | −0.268567 | 0.476319 | 0.301653 |
| fgt_200 | −0.003292 | −0.005356 | −0.480595 |
| fta_200 | 0.008541 | −0.051466 | −0.043727 |
| ftc_200 | −0.002311 | −0.071793 | −0.012283 |
| ftg_200 | −0.000159 | −0.035737 | −0.348887 |
| ftt_200 | −0.168724 | −0.411842 | 0.133115 |
| fgap_200 | 0.896756 | 0.153753 | 0.032474 |
[i] Columns in the table are eigenvectors from spectral decompositions of appropriate variance/covariance matrices. Thus, each has norm 1 (the squares of the coefficients add up to 1), and PCA1 and PCA2, which come from the same decomposition, are orthogonal (the cross products add up to 0).