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# CITATION.cff file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
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cff-version: 1.2.0
message: 'To cite package "risdr" in publications use:'
type: software
license: GPL-3.0-or-later
title: 'risdr: Regularised and Information-Theoretic Sufficient Dimension Reduction'
version: 0.4.0
doi: 10.32614/CRAN.package.risdr
identifiers:
- type: doi
  value: 10.32614/CRAN.package.risdr
abstract: Implements covariance-stabilised sufficient dimension reduction for continuous
  responses, with an additional sparse engine for continuous, categorical, and right-censored
  survival responses and information-theoretic structural dimension selection. Supported
  methods include sliced inverse regression, sliced average variance estimation, directional
  regression, and principal Hessian directions. Sample, ridge, Oracle Approximating
  Shrinkage, Ledoit-Wolf, and Maximum Entropy Covariance (MEC) estimators are provided
  alongside prediction, resampling, simulation, and diagnostic utilities. The sufficient
  dimension reduction methods build on Li (1991) <https://doi.org/10.1080/01621459.1991.10475035>,
  Li (1992) <https://doi.org/10.1080/01621459.1992.10476258>, and Li and Wang (2007)
  <https://doi.org/10.1198/016214507000000536>. Covariance shrinkage follows Olorede
  and Yahya (2019) <https://doi.org/10.48550/arXiv.1909.13017>, Ledoit and Wolf (2004)
  <https://doi.org/10.1016/S0047-259X(03)00096-4> and Chen et al. (2010) <https://doi.org/10.1109/TSP.2010.2053029>.
authors:
- family-names: Olorede
  given-names: Kabir
  email: kabirolorede@gmail.com
preferred-citation:
  type: manual
  title: 'risdr: Regularised and Information-Theoretic Sufficient Dimension Reduction'
  authors:
  - family-names: Olorede
    given-names: Kabir Opeyemi
  year: '2026'
  doi: 10.32614/CRAN.package.risdr
  notes: R package version 0.4.0
  url: https://CRAN.R-project.org/package=risdr
repository: https://ilovemaths.r-universe.dev
repository-code: https://github.com/ilovemaths/risdr
commit: 9add706529ec156d1570ee3390c09db303c9e06a
url: https://ilovemaths.github.io/risdr/
date-released: '2026-10-12'
contact:
- family-names: Olorede
  given-names: Kabir
  email: kabirolorede@gmail.com
references:
- type: generic
  title: A New Covariance Estimator for Sufficient Dimension Reduction in High-Dimensional
    and Undersized Sample Problems
  authors:
  - family-names: Olorede
    given-names: Kabir Opeyemi
  - family-names: Yahya
    given-names: Waheed Babatunde
  year: '2019'
  notes: arXiv:1909.13017 [stat.ME]
  doi: 10.48550/arXiv.1909.13017
  url: https://arxiv.org/abs/1909.13017