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type: software
license: MIT
title: 'Styperidge.reg: S-Type Ridge Regression'
version: 0.1.0
doi: 10.32614/CRAN.package.Styperidge.reg
abstract: 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) <https://doi.org/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>.
authors:
- family-names: Karadag
  given-names: Filiz
  email: filiz.karadag@ege.edu.tr
  orcid: https://orcid.org/0000-0002-0116-7772
- family-names: Sazak
  given-names: HakanSavas
  email: hakan.savas.sazak@ege.edu.tr
  orcid: https://orcid.org/0000-0001-6123-1214
- family-names: Aydin
  given-names: Olgun
  email: olgun.aydin@pg.edu.pl
  orcid: https://orcid.org/0000-0002-7090-0931
repository: https://filizkrdg.r-universe.dev
repository-code: https://github.com/filizkrdg/Styperidge.reg
commit: d48a821ef8328c5afd8fd1bccdc26836a94c6561
url: https://github.com/filizkrdg/Styperidge.reg
date-released: '2026-01-09'
contact:
- family-names: Karadag
  given-names: Filiz
  email: filiz.karadag@ege.edu.tr
  orcid: https://orcid.org/0000-0002-0116-7772