survobj: Simulate Parametric and Semi-Parametric Survival Times with Object-Oriented Design

Simulate parametric and semi-parametric survival times through a consistent, reusable interface for each distribution, using an object-oriented design. Supported distributions include Exponential, Weibull, Gompertz, Log-Logistic, Log-Normal, and Piecewise Exponential. Random variates can be generated under Proportional Hazards, Accelerated Failure Time, and Extended Hazards models, as well as under renewal and non-homogeneous Poisson recurrent event processes, following the methods described by Bender (2003) <doi:10.5282/UBM/EPUB.1716> and Leemis (1987) in Operations Research, 35(6), 892-894.

Version:	3.2.0
Depends:	R (≥ 4.1.0)
Imports:	dplyr, tidyr, ggplot2, survival
Suggests:	knitr, rmarkdown, spelling, testthat (≥ 3.0.0)
Published:	2026-09-20
DOI:	10.32614/CRAN.package.survobj
Author:	Aponte John [aut, cre, cph]
Maintainer:	Aponte John <john.j.aponte at gmail.com>
BugReports:	https://github.com/johnaponte/survobj/issues
License:	GPL (≥ 3)
URL:	https://johnaponte.github.io/survobj/, https://github.com/johnaponte/survobj
NeedsCompilation:	no
Language:	en-US
Materials:	README, NEWS
CRAN checks:	survobj results

Documentation:

Reference manual:	survobj.html , survobj.pdf
Vignettes:	Defining and using objects of class SURVIVAL (source, R code) Simulation of survival times (source, R code) Simulating trials with multiple events (source, R code) Simulating trials with survival endpoints (source, R code) Simulation trials: non-proportional hazard (source, R code)

Downloads:

Package source:	survobj_3.2.0.tar.gz
Windows binaries:	r-devel: survobj_3.1.1.zip, r-release: survobj_3.1.1.zip, r-oldrel: survobj_3.1.1.zip
macOS binaries:	r-release (arm64): not available, r-oldrel (arm64): survobj_3.2.0.tgz, r-release (x86_64): survobj_3.2.0.tgz, r-oldrel (x86_64): survobj_3.2.0.tgz
Old sources:	survobj archive

Linking:

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