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- W4289637420 abstract "We develop a high-dimensional graphical modeling approach for functional data where the number of functions exceeds the available sample size. This is accomplished by proposing a sparse estimator for a concentration matrix when identifying linear manifolds. As such, the procedure extends the ideas of the manifold representation for functional data to high-dimensional settings where the number of functions is larger than the sample size. By working in a penalized setting it enriches the functional data framework by estimating sparse undirected graphs that show how functional nodes connect to other functional nodes. The procedure allows multiple coarseness scales to be present in the data and proposes a simultaneous estimation of several related graphs. Its performance is illustrated using a real-life fMRI dataset and with simulated data." @default.
- W4289637420 created "2022-08-03" @default.
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- W4289637420 date "2022-10-11" @default.
- W4289637420 modified "2023-09-28" @default.
- W4289637420 title "Linear Manifold Modeling and Graph Estimation based on Multivariate Functional Data with Different Coarseness Scales" @default.
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- W4289637420 doi "https://doi.org/10.1080/10618600.2022.2108818" @default.
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