Pedigree-based Relatedness Coefficients R package ribd version 1.7.2 Recursive algorithms for computing various relatedness coefficients, including pairwise kinship, kappa and identity coefficients. Both autosomal and X-linked coefficients are computed. Founders are allowed to be inbred, which enables construction of any given kappa coefficients, as described in Vigeland (2020) <doi:10.1007/s00285-020-01505-x>. In addition to the standard coefficients, 'ribd' also computes a range of lesser-known coefficients, including generalised kinship coefficients, multi-person coefficients and two-locus coefficients (Vigeland, 2023, <doi:10.1093/g3journal/jkac326>). Many features of 'ribd' are available through the online app 'QuickPed' at <https://magnusdv.shinyapps.io/quickped>; see Vigeland (2022) <doi:10.1186/s12859-022-04759-y>. Software Depends: R (>= 4.2.0), pedtools (>= 2.6.0) Imports: glue, kinship2, slam Suggests: ggplot2, ggrepel, plotly, spelling, testthat Magnus Dehli Vigeland <m.d.vigeland@medisin.uio.no> Comprehensive R Archive Network (CRAN) Magnus Dehli Vigeland [aut, cre] (ORCID: <https://orcid.org/0000-0002-9134-4962>) GPL-3 2026-08-03 application/tgz https://CRAN.R-project.org/package=ribd doi:10.32614/CRAN.package.ribd en-GB