A Toolkit for Archetypal Analysis Methods R package yaap version 1.0.0 Fits archetypal analysis models, including Euclidean, probabilistic, kernel, and directional variants. Methods include classical archetypal analysis from Cutler and Breiman (1994) <doi:10.1080/00401706.1994.10485840>, PCHA and kernel variants from Mørup and Hansen (2012) <doi:10.1016/j.neucom.2011.06.033>, probabilistic archetypal analysis from Seth and Eugster (2016) <doi:10.1007/s10994-015-5498-8>, directional archetypal analysis from Olsen et al. (2022) <doi:10.3389/fnins.2022.911034>, AA++ initialization from Mair and Sjölund (2023) <doi:10.48550/arXiv.2301.13748>, coreset-style initialization from Mair and Brefeld (2019) <https://proceedings.neurips.cc/paper_files/paper/2019/file/7f278ad602c7f47aa76d1bfc90f20263-Paper.pdf>, and adapted AIC from Suleman (2017) <doi:10.1109/FUZZ-IEEE.2017.8015385>. Provides initialization helpers, model selection paths, plotting methods, 'broom' methods, and a 'tidymodels' recipe step. Software Depends: R (>= 4.1.0) Imports: generics (>= 0.1.3), graphics, methods, Matrix, matrixStats, nnls, rlang (>= 1.0.0), stats, tibble (>= 3.0.0), utils, vctrs Suggests: archetypes, bench, compositions, fda, geometry, ggplot2, ggtern, irlba, knitr, MASS, quadprog, recipes (>= 1.0.0), rmarkdown, RSpectra, testthat (>= 3.0.0), tune (>= 1.0.0), withr (>= 2.5.0) Teo Sakel <teo@intelligentbiodata.com> Comprehensive R Archive Network (CRAN) Teo Sakel [aut, cre, cph] (ORCID: <https://orcid.org/0000-0001-9946-9498>), MCIU/AEI [fnd] (ROR: <https://ror.org/05r0vyz12>, DOI: 10.13039/501100011033) GPL (>= 3) 2026-06-07 application/tgz https://CRAN.R-project.org/package=yaap doi:10.32614/CRAN.package.yaap