Transformation Models R package tram version 1.4-4 CRAN Task View: Survival (https://CRAN.R-project.org/view=Survival) Formula-based user-interfaces to specific transformation models implemented in package 'mlt' (<DOI:10.32614/CRAN.package.mlt>, <DOI:10.32614/CRAN.package.mlt.docreg>). Available models include Cox models, some parametric survival models (Weibull, etc.), models for ordered categorical variables, normal and non-normal (Box-Cox type) linear models, and continuous outcome logistic regression (Lohse et al., 2017, <DOI:10.12688/f1000research.12934.1>). The underlying theory is described in Hothorn et al. (2018) <DOI:10.1111/sjos.12291>. An extension to transformation models for clustered data is provided (Barbanti and Hothorn, 2022, <DOI:10.1093/biostatistics/kxac048>) and a tutorial explains applications in survival analysis (Siegfried et al., 2025, <DOI:10.48550/arXiv.2402.06428>). Multivariate conditional transformation models (Klein et al, 2022, <DOI:10.1111/sjos.12501>) and shift-scale transformation models (Siegfried et al, 2023, <DOI:10.1080/00031305.2023.2203177>) can be fitted as well. The package contains an implementation of a doubly robust score test, described in Kook et al. (2024, <DOI:10.1080/01621459.2024.2395588>). Software Depends: R (>= 4.5.0), mlt (>= 1.8-0), mvtnorm (>= 1.3-7) Imports: Formula, multcomp, variables (>= 1.0-4), basefun (>= 1.1-2), sandwich, stats, survival, graphics, Matrix, methods Suggests: MASS, TH.data, trtf (>= 0.3-3), mlbench, knitr, quantreg, colorspace, ATR, lme4, reformulas, merDeriv, SparseGrid, alabama, numDeriv, gridExtra, lattice, latticeExtra, HSAUR3, ordinalCont, coxme, mlt.docreg, ordinal, coin, asht, gamlss, randomForestSRC, tramME, glmmTMB, geepack, ranger, eha, flexsurv, frailtyEM, frailtypack, gamlss.cens, icenReg, mpr, rms, rstpm2, timereg, Stat2Data, cotram, latex2exp, tramvs, AER, KONPsurv, gamlss.data, xtable, english, bibtex, expm, mgcv, pracma Torsten Hothorn <Torsten.Hothorn@R-project.org> Comprehensive R Archive Network (CRAN) Torsten Hothorn [aut, cre] (ORCID: <https://orcid.org/0000-0001-8301-0471>), Luisa Barbanti [ctb] (ORCID: <https://orcid.org/0000-0001-5352-5802>), Sandra Siegfried [aut] (ORCID: <https://orcid.org/0000-0002-7312-1001>), Lucas Kook [aut] (ORCID: <https://orcid.org/0000-0002-7546-7356>), Susanne Dandl [ctb] (ORCID: <https://orcid.org/0000-0003-4324-4163>), Brian Ripley [ctb], Bill Venables [ctb], Douglas M. Bates [ctb], Nadja Klein [ctb] GPL-2 2026-07-16 application/tgz https://CRAN.R-project.org/package=tram doi:10.32614/CRAN.package.tram