Tree-Based Varying Coefficient Regression for Generalized Linear and Ordinal Mixed Models R package vcrpart version 1.0-7 Recursive partitioning for varying coefficient generalized linear models and ordinal linear mixed models. Special features are coefficient-wise partitioning, non-varying coefficients and partitioning of time-varying variables in longitudinal regression. A description of a part of this package was published by Burgin and Ritschard (2017) <doi:10.18637/jss.v080.i06>. Software Depends: R (>= 3.1.0), parallel, partykit Imports: stats, grid, graphics, methods, nlme (>= 3.1-123), rpart, formula.tools, numDeriv, ucminf, zoo, sandwich, strucchange Suggests: xtable, mlbench, Ecdat, RWeka Reto Burgin <rbuergin@gmx.ch> Comprehensive R Archive Network (CRAN) Reto Burgin [aut, cre] (ORCID: <https://orcid.org/0000-0002-6212-1567>), Gilbert Ritschard [ctb] (ORCID: <https://orcid.org/0000-0001-7776-0903>) GPL (>= 2) 2025-08-26 application/tgz https://CRAN.R-project.org/package=vcrpart doi:10.32614/CRAN.package.vcrpart