Package: fuzzySurvival Title: Fuzzy Survival Analysis with Vague Event Times and Fuzzy Censoring Version: 0.1.0 Authors@R: c( person(given = "Mukul", family = "Bijalwan", role = c("aut", "cre"), email = "mukulbijalwan555@gmail.com", comment = c(ORCID = "0009-0001-3040-6912")), person(given = "Gunjan", family = "Aggrwal", role = "aut"), person(given = "Mukul", family = "Jain", role = "aut")) Description: Fuzzy survival analysis for data in which event times and/or failure indicators are vague, for instance when a failure is only known to have occurred during the second quarter of a year, or when it is uncertain whether a subject lost to follow-up had in fact failed. Vague information is represented by fuzzy numbers. The package provides a fuzzy product-limit estimator obtained from nested alpha-cuts of the fuzzy survival function, a fuzzy Cox proportional hazards model with fuzzy coefficient and hazard ratio estimates, and a fuzzy log-rank test. Type-reduction utilities for summarizing fuzzy estimates by single numbers, a simulation engine for validation studies, plotting, print and summary methods, and alpha-cut based confidence bands are provided. The bounds are computed at the alpha-cuts of the fuzzy event times, so the alpha-cut intervals returned for the survival function, the regression coefficients and the test statistic are nested by construction. License: MIT + file LICENSE Encoding: UTF-8 Depends: R (>= 4.1.0) Imports: stats, graphics, grDevices, survival (>= 3.2-13) Suggests: testthat (>= 3.0.0), knitr, rmarkdown, covr VignetteBuilder: knitr Config/testthat/edition: 3 LazyData: true Config/roxygen2/version: 8.1.0 NeedsCompilation: no Packaged: 2026-10-15 20:42:24 UTC; root Author: Mukul Bijalwan [aut, cre] (ORCID: ), Gunjan Aggrwal [aut], Mukul Jain [aut] Maintainer: Mukul Bijalwan Repository: https://cran.r-universe.dev Date/Publication: 2026-10-15 19:16:57 UTC RemoteUrl: https://github.com/cran/fuzzySurvival RemoteRef: HEAD RemoteSha: 248aa51023d1db17715e90739fb01b1be9f84dfe