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. Author manuscript; available in PMC: 2021 Feb 23.
Published in final edited form as: J Am Stat Assoc. 2019 Dec 12;115(532):1574–1597. doi: 10.1080/01621459.2019.1686391

Figure 6.

Figure 6.

The coronal, axial, and sagittal planes of the estimated first eigenimage in the analysis of ADNI dataset, where the upper three rows represent the positive values and the lower three rows denote the negative values. Note that the sign of an eigenimage is not identifiable in FPCA, and the +/− signs are used here only for separating the regions of eigenimages that exhibit opposite signs.