Generalized Hybrid Contrast Coding in Linear Models R package ghcclm version 0.1.0 Implements generalized hybrid contrast coding methods for K-level categorical predictors in linear models as established by Obulezi (2026)[cite: 3]. The package automates design matrix construction mixing dummy indicators and composite group contrasts, checks rank constraints via singular value decomposition, computes closed-form OLS parameter mappings, and estimates robust heteroscedastic covariance matrices[cite: 3]. Software Depends: R (>= 4.0.0) Imports: stats Suggests: testthat (>= 3.0.0) Okechukwu J. Obulezi <oj.obulezi@unizik.edu.ng> Comprehensive R Archive Network (CRAN) Okechukwu J. Obulezi [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=ghcclm/LICENSE) 2026-08-08 application/tgz https://CRAN.R-project.org/package=ghcclm doi:10.32614/CRAN.package.ghcclm