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>).
| Version: |
1.4-1 |
| Depends: |
R (≥ 3.5.0), mlt (≥ 1.7-4), mvtnorm (≥ 1.3-2) |
| 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 |
| Published: |
2026-03-08 |
| DOI: |
10.32614/CRAN.package.tram |
| Author: |
Torsten Hothorn 
[aut, cre],
Luisa Barbanti
[ctb],
Sandra Siegfried
[aut],
Lucas Kook [aut],
Susanne Dandl
[ctb],
Brian Ripley [ctb],
Bill Venables [ctb],
Douglas M. Bates [ctb],
Nadja Klein [ctb] |
| Maintainer: |
Torsten Hothorn <Torsten.Hothorn at R-project.org> |
| License: |
GPL-2 |
| URL: |
https://ctm.R-forge.R-project.org |
| NeedsCompilation: |
no |
| Citation: |
tram citation info |
| Materials: |
NEWS |
| In views: |
Survival |
| CRAN checks: |
tram results |