S-Type Ridge Regression R package Styperidge.reg version 0.1.0 Implements S-type ridge regression, a robust and multicollinearity-aware linear regression estimator that combines S-type robust weighting (via the 'Stype.est' package) with ridge penalization; automatically selects the ridge parameter using the 'ridgregextra' approach targeting a close to 1 variance inflation factor (VIF), and returns comprehensive outputs (coefficients, fitted values, residuals, mean squared error (MSE), etc.) with an easy x/y interface and optional user-supplied weights. See Sazak and Mutlu (2021) <doi:10.1080/03610918.2021.1928196>, Karadag et al. (2023) <https://CRAN.R-project.org/package=ridgregextra> and Sazak et al. (2025) <https://CRAN.R-project.org/package=Stype.est>. Software Depends: R (>= 4.0.0) Imports: stats, mctest, isdals, ridgregextra, Stype.est Suggests: knitr, rmarkdown Filiz Karadag <filiz.karadag@ege.edu.tr> Comprehensive R Archive Network (CRAN) Filiz Karadag [cre] (ORCID: <https://orcid.org/0000-0002-0116-7772>), HakanSavas Sazak [aut] (ORCID: <https://orcid.org/0000-0001-6123-1214>), Olgun Aydin [aut] (ORCID: <https://orcid.org/0000-0002-7090-0931>) MIT + file LICENSE (https://CRAN.R-project.org/package=Styperidge.reg/LICENSE) 2026-01-12 application/tgz https://CRAN.R-project.org/package=Styperidge.reg doi:10.32614/CRAN.package.Styperidge.reg