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Table 8 Principal Component Analysis, crossvalidation, eigenvalues and related percentages (after log-ratio, −As), using MVA add-in for Excel by R.G. Brereton

From: Rings or daggers, axes or fibulae have a different composition? A multivariate study on Central Italy bronzes from eneolithic to early iron age

N. PCs RSS PRESS E-value %
#1 165.930 175.847 0.914 41.346
#2 109.555 148.885 0.440 19.927
#3 55.506 68.195 0.422 19.105
#4 20.040 23.488 0.277 12.538
#5 6.479 7.981 0.106 4.793
#6 1.64E-05 n/a 0.051 2.291
Total SS 5017.054 5017.054