Piece-Wise Exponential Additive Mixed Modeling Tools for Survival Analysis R package pammtools version 0.8.0 The Piece-wise exponential (Additive Mixed) Model (PAMM; Bender and others (2018) <doi: 10.1177/1471082X17748083>) is a powerful model class for the analysis of survival (or time-to-event) data, based on Generalized Additive (Mixed) Models (GA(M)Ms). It offers intuitive specification and robust estimation of complex survival models with stratified baseline hazards, random effects, time-varying effects, time-dependent covariates and cumulative effects (Bender and others (2019)), as well as support for left-truncated data as well as competing risks, recurrent events and multi-state settings. pammtools provides tidy workflow for survival analysis with PAMMs, including data simulation, transformation and other functions for data preprocessing and model post-processing as well as visualization. Software Depends: R (>= 4.1.0) Imports: mgcv, survival (>= 2.39-5), checkmate, magrittr, rlang, tidyr (>= 1.0.0), ggplot2 (>= 3.2.2), dplyr (>= 1.0.0), purrr (>= 0.2.3), tibble, lazyeval, Formula, mvtnorm, pec, vctrs (>= 0.3.0), scam Suggests: testthat, mstate, broom, etm, xgboost Andreas Bender <andreas.bender@stat.uni-muenchen.de> Comprehensive R Archive Network (CRAN) Andreas Bender [aut, cre] (ORCID: <https://orcid.org/0000-0001-5628-8611>), Fabian Scheipl [aut] (ORCID: <https://orcid.org/0000-0001-8172-3603>), Johannes Piller [aut] (ORCID: <https://orcid.org/0009-0008-3010-9556>), Philipp Kopper [aut] (ORCID: <https://orcid.org/0000-0002-5037-7135>), Lukas Burk [ctb] (ORCID: <https://orcid.org/0000-0001-7528-3795>) MIT + file LICENSE (https://CRAN.R-project.org/package=pammtools/LICENSE) 2026-06-22 application/tgz https://CRAN.R-project.org/package=pammtools doi:10.32614/CRAN.package.pammtools