Linear and Nonlinear Mixed Effects Models R package nlme version 3.1-170 CRAN Task View: ChemPhys (https://CRAN.R-project.org/view=ChemPhys) CRAN Task View: ClinicalTrials (https://CRAN.R-project.org/view=ClinicalTrials) CRAN Task View: Econometrics (https://CRAN.R-project.org/view=Econometrics) CRAN Task View: Environmetrics (https://CRAN.R-project.org/view=Environmetrics) CRAN Task View: Finance (https://CRAN.R-project.org/view=Finance) CRAN Task View: MixedModels (https://CRAN.R-project.org/view=MixedModels) CRAN Task View: OfficialStatistics (https://CRAN.R-project.org/view=OfficialStatistics) CRAN Task View: Psychometrics (https://CRAN.R-project.org/view=Psychometrics) CRAN Task View: Spatial (https://CRAN.R-project.org/view=Spatial) CRAN Task View: SpatioTemporal (https://CRAN.R-project.org/view=SpatioTemporal) Fit and compare Gaussian linear and nonlinear mixed-effects models. Software Depends: R (>= 3.6.0) Imports: graphics, stats, utils, lattice Suggests: MASS R Core Team <R-core@R-project.org> Comprehensive R Archive Network (CRAN) José Pinheiro [aut] (S version), Douglas Bates [aut] (up to 2007), Saikat DebRoy [ctb] (up to 2002), Deepayan Sarkar [ctb] (up to 2005), EISPACK authors [ctb] (src/rs.f), Siem Heisterkamp [ctb] (Author fixed sigma), Bert Van Willigen [ctb] (Programmer fixed sigma), Johannes Ranke [ctb] (varConstProp()), R Core Team [aut, cre] (ROR: <https://ror.org/02zz1nj61>) GPL (>= 2) 2026-07-15 application/tgz https://CRAN.R-project.org/package=nlme doi:10.32614/CRAN.package.nlme