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Table 2
Amount of the total variance of the two most significant eigenvectors for randomly selected subsamples of the spectral library.
| Subsample | Variance of u1 | Variance of u2 |
| (% of total) | (% of total) | |
| mean stdev | mean stdev | |
|
|
||
| 1/2 | 94.62 0.03 | 4.24 0.04 |
| 1/4 | 94.62 0.07 | 4.25 0.07 |
| 1/8 | 94.66 0.11 | 4.20 0.09 |
| 1/16 | 94.65 0.16 | 4.22 0.13 |
Notes. The PCA was applied ten times for each subsample.
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