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: | 1.3-2 |
| Depends: | R (≥ 3.5.0),mlt (≥ 1.7-0),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 |
| Published: | 2025-12-15 |
| 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: | http://ctm.R-forge.R-project.org |
| NeedsCompilation: | no |
| Citation: | tram citation info |
| Materials: | NEWS |
| In views: | Survival |
| CRAN checks: | tram results |