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. Author manuscript; available in PMC: 2021 Jun 1.
Published in final edited form as: Environmetrics. 2019 Dec 19;31(4):e2614. doi: 10.1002/env.2614

Table 3:

Means (standard deviations) of estimated PC1 loadings across 1,000 replications with a three-dimensional surface with independent noise and complete training data.

X1 X2 X3
PCA 0.53 (0.06) 0.39 (0.04) 0.75 (0.03)
PredPCA 0.89 (0.02) 0.01 (0.02) 0.45 (0.04)
ProPrPCA-Krige 0.88 (0.02) 0.03 (0.04) 0.47 (0.04)
ProPrPCA-Spline 0.89 (0.02) 0.01 (0.03) 0.46 (0.04)