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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 "hsquared" in publications use:'
type: software
license: MIT
title: 'hsquared: ''R'' Interface for ''Julia''-Backed Quantitative-Genetic Models'
version: 0.9.0
identifiers:
- type: url
  value: https://github.com/itchyshin/HSquared.jl
abstract: Provides an interface for quantitative-genetic models in 'R', backed by
  the 'HSquared.jl' engine for 'Julia'. Fits Gaussian pedigree animal models by restricted
  maximum likelihood, using average-information restricted maximum likelihood (AI-REML;
  Gilmour et al. (1995) <https://doi.org/10.2307/2533274>) for the univariate model.
  Returns heritability, variance components, breeding values, and covariance and correlation
  matrices for multivariate models. Formula and pedigree validation can run without
  'Julia'. Model fitting requires a local 'Julia' and 'HSquared.jl'; use hs_control(engine
  = "validate") to preview the model contract without fitting. What you may report
  is listed on the package article 'Can I fit and report this?', not in validation_status(),
  which is a developer evidence table. Model-specific restrictions are documented
  in that article. Uncertainty intervals are not coverage-calibrated.
authors:
- family-names: Nakagawa
  given-names: Shinichi
  email: itchyshin@gmail.com
  orcid: https://orcid.org/0000-0002-7765-5182
- family-names: Yang
  given-names: Yefeng
  orcid: https://orcid.org/0000-0002-8610-4016
- family-names: Drobniak
  given-names: Szymon
  orcid: https://orcid.org/0000-0001-8101-6247
preferred-citation:
  type: manual
  title: 'hsquared: R Interface for Julia-Backed Quantitative-Genetic Models'
  authors:
  - family-names: Nakagawa
    given-names: Shinichi
    email: itchyshin@gmail.com
    orcid: https://orcid.org/0000-0002-7765-5182
  - family-names: Yang
    given-names: Yefeng
    orcid: https://orcid.org/0000-0002-8610-4016
  - family-names: Drobniak
    given-names: Szymon
    orcid: https://orcid.org/0000-0001-8101-6247
  year: '2026'
  notes: R package version 0.9.0 ; Julia twin HSquared.jl. A single twin DOI (D-23)
    will replace this note when both packages are tagged 0.9.0 and the Zenodo (or
    equivalent) deposit exists - no DOI is claimed here yet.
  url: https://github.com/itchyshin/hsquared
repository: https://cran.r-universe.dev
repository-code: https://github.com/itchyshin/hsquared
commit: 0b9138d212f0237c5c9248016665ca24cc316f85
url: https://itchyshin.github.io/hsquared/
date-released: '2026-10-21'
contact:
- family-names: Nakagawa
  given-names: Shinichi
  email: itchyshin@gmail.com
  orcid: https://orcid.org/0000-0002-7765-5182