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Jolliffe I. Principal Component Analysis (2ed., Springer, 2002)(518s)

Jolliffe I. Principal Component Analysis (2ed., Springer, 2002)(518s)

Jolliffe I. Principal Component Analysis (2ed., Springer, 2002)(518s)

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10.2. Influential Observations in a <strong>Principal</strong> <strong>Component</strong> <strong>Analysis</strong> 255Table 10.2. Artistic qualities of painters: comparisons between estimated (empirical) and actual (sample) influence of individualobservations for the first two PCs, based on the covariance matrix.<strong>Component</strong> number 1 2InfluenceInfluenceEigenvalue Eigenvector Eigenvalue EigenvectorEstimated Actual Obs. no. Estimated Actual Obs. no. Estimated Actual Obs. no. Estimated Actual Obs. no.2.490 2.486 31 6.791 6.558 34 1.759 1.854 44 11.877 13.767 342.353 2.336 7 5.025 4.785 44 1.757 1.770 48 5.406 5.402 442.249 2.244 28 3.483 4.469 42 1.478 1.491 34 3.559 4.626 422.028 2.021 5 1.405 1.260 48 1.199 1.144 43 2.993 3.650 43............0.248 0.143 44 0.001 0.001 53 −0.073 −0.085 49 0.016 0.017 24−0.108 −0.117 52 0.000 0.000 17 −0.090 −0.082 20 0.009 0.009 1−0.092 −0.113 37 0.000 0.000 24 0.039 0.045 37 0.000 0.001 300.002 −0.014 11 0.000 0.000 21 −0.003 −0.010 10 0.000 0.000 53

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