Table 6 Eigenvector statistics of selected ASTER bands 4, 6, 7 and 8 for illite.

From: Gold exploration in the Gabal Abu Karahish area, Central Eastern Desert, Egypt: an integrated geological perspective

Eigenvector

B4↑

B6↓

B7↑

B8↓

Stdev

Eigenvalue

Eigen%

PC 1

0.982195

0.090829

-0.15934

-0.04065

0.084914

0.007471

97.6

PC 2

0.11263

-0.96656

0.179984

-0.14381

0.012498

0.000098

1.3

PC 3

0.13479

0.206267

0.966556

-0.07109

0.016143

0.000072

0.9

PC 4

-0.06663

0.122327

-0.08935

-0.98621

0.005215

0.000013

0.2

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