riemtan: Riemannian Metrics for Symmetric Positive Definite Matrices

Implements various Riemannian metrics for symmetric positive definite matrices, including AIRM (Affine Invariant Riemannian Metric, see Pennec, Fillard, and Ayache (2006) <doi:10.1007/s11263-005-3222-z>), Log-Euclidean (see Arsigny, Fillard, Pennec, and Ayache (2006) <doi:10.1002/mrm.20965>), Euclidean, Log-Cholesky (see Lin (2019) <doi:10.1137/18M1221084>), and Bures-Wasserstein metrics (see Bhatia, Jain, and Lim (2019) <doi:10.1016/j.exmath.2018.01.002>). Provides functions for computing logarithmic and exponential maps, vectorization, and statistical operations on the manifold of positive definite matrices.

Version: 0.1.0
Depends: R (≥ 4.3.0), Matrix
Imports: methods, expm, R6, purrr, MASS, furrr
Suggests: testthat (≥ 3.0.0), knitr, rmarkdown
Published: 2025-04-23
DOI: 10.32614/CRAN.package.riemtan
Author: Nicolas Escobar ORCID iD [aut, cre], Jaroslaw Harezlak [ths]
Maintainer: Nicolas Escobar <nescoba at iu.edu>
BugReports: https://github.com/nicoesve/riemtan/issues
License: MIT + file LICENSE
URL: https://nicoesve.github.io/riemtan/
NeedsCompilation: no
Materials: README NEWS
CRAN checks: riemtan results

Documentation:

Reference manual: riemtan.pdf
Vignettes: riemtan: Statistical Analysis of Connectomes using Riemannian Geometry (source, R code)

Downloads:

Package source: riemtan_0.1.0.tar.gz
Windows binaries: r-devel: not available, r-release: not available, r-oldrel: not available
macOS binaries: r-release (arm64): riemtan_0.1.0.tgz, r-oldrel (arm64): riemtan_0.1.0.tgz, r-release (x86_64): riemtan_0.1.0.tgz, r-oldrel (x86_64): riemtan_0.1.0.tgz

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