An 'Armadillo' Interface R package cpp11armadillo version 0.5.4 Provides function declarations and inline function definitions that facilitate communication between R and the 'Armadillo' 'C++' library for linear algebra and scientific computing. This implementation is detailed in Vargas Sepulveda and Schneider Malamud (2024) <doi:10.1016/j.softx.2025.102087>. Software Depends: R(>= 3.5.0) Imports: cpp11 Suggests: desc, knitr, mockery, rmarkdown, testthat (>= 3.0.0), withr Mauricio Vargas Sepulveda <m.sepulveda@mail.utoronto.ca> Comprehensive R Archive Network (CRAN) Mauricio Vargas Sepulveda [aut, cre] (ORCID: <https://orcid.org/0000-0003-1017-7574>), Jonathan Schneider Malamud [ctb], Conrad Sanderson [aut] (Armadillo library (C++)) Apache License (>= 2) 2025-07-20 application/tgz https://CRAN.R-project.org/package=cpp11armadillo doi:10.32614/CRAN.package.cpp11armadillo