Figure 9 — Longitudinal activity monitoring and lifespan: quantifying the interface

Research Perspective|Volume 16, Issue 17|pp. 12108–12122

Longitudinal activity monitoring and lifespan: quantifying the interface

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Figure 9.Mean function and eigenfunctions for longitudinal behavioral data. The estimated mean function

\hat{μ}

and the first three estimated spherical eigenfunctions

{\hat{ϕ}}_{1}, {\hat{ϕ}}_{2}, {\hat{ϕ}}_{3}

for the behavioral fly data using spherical functional principal component analysis. The first three eigenfunctions explain 96.54% of the total variation, with the individual components explaining 80.55%, 12.23% and 3.76%, respectively.