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fastFGEE: Fast Functional Generalized Estimating Equations via a One-Step Estimator

Fits functional generalized estimating equations for longitudinal functional outcomes and covariates using a one-step estimator that is fast even for large cluster sizes or large numbers of clusters. The package supports quasi-likelihoods derived from a range of families, common link functions, and several working correlation structures. Uncertainty quantification is based on sandwich variance estimators and bootstrap procedures that remain valid even when the working correlation is incorrectly specified. The package provides an implementation of the method described in Loewinger et al. (2025) <https://pmc.ncbi.nlm.nih.gov/articles/PMC12306803/>. For irregularly spaced AR(1) precision matrices, the package can optionally use the archived package 'irregulAR1'; if needed, it can be obtained from the CRAN Archive at <https://cran.r-project.org/src/contrib/Archive/irregulAR1/>.

Version: 0.1.0
Depends: R (≥ 4.2)
Imports: data.table, ggplot2, gridExtra, MASS, Matrix, mgcv, refund, Rfast, SuperGauss
Suggests: irregulAR1, knitr, rmarkdown, sanic, Rcpp, RcppArmadillo
Published: 2026-04-08
DOI: 10.32614/CRAN.package.fastFGEE (may not be active yet)
Author: Gabriel Loewinger ORCID iD [aut, cre]
Maintainer: Gabriel Loewinger <gloewinger at gmail.com>
BugReports: https://github.com/gloewing/fastFGEE/issues
License: GPL (≥ 3)
URL: https://github.com/gloewing/fastFGEE
NeedsCompilation: no
CRAN checks: fastFGEE results

Documentation:

Reference manual: fastFGEE.html , fastFGEE.pdf
Vignettes: fastFGEE: Functional Generalized Estimating Equations (source, R code)

Downloads:

Package source: fastFGEE_0.1.0.tar.gz
Windows binaries: r-devel: not available, r-release: not available, r-oldrel: not available
macOS binaries: r-release (arm64): fastFGEE_0.1.0.tgz, r-oldrel (arm64): not available, r-release (x86_64): fastFGEE_0.1.0.tgz, r-oldrel (x86_64): fastFGEE_0.1.0.tgz

Linking:

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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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