Package: FastSurvival
Type: Package
Title: Fast Survival Analysis and Simulation for Clinical Trials
Version: 0.2.0
Authors@R: person(
    given  = "Gosuke",
    family = "Homma",
    role   = c("aut", "cre"),
    email  = "my.name.is.gosuke@gmail.com"
  )
Description: Provides fast alternatives to standard survival analysis functions
    in the 'survival' package, together with tools for time-to-event trial
    simulation and sequential analysis. The estimation and testing functions
    cover a single-time-point Kaplan-Meier estimator (survfit_fast()), log-rank
    tests including weighted and stratified variants (survdiff_fast()), a
    closed-form hazard ratio estimator based on the Pike-Halley Estimator method
    (coxph_fast()), restricted mean survival time (rmst_fast()), window mean
    survival time (wmst_fast()), milestone survival comparison
    (milestone_fast()), median survival time (medsurv_fast()), the max-combo
    test (maxcombo_fast()), the robust modestly-weighted log-rank test
    (rmw_fast()), the weighted Kaplan-Meier (Pepe-Fleming) test (wkm_fast()),
    the average hazard with survival weight (ahsw_fast()), and the
    Kalbfleisch-Prentice average hazard ratio (ahr_fast()). The simulation
    layer generates individual patient data (simdata_fast()), performs interim
    or sequential analyses (analysis_fast()), and aggregates operating
    characteristics (simsummary_fast()). A visualization layer assembles
    design-stage scenarios (gen_scenario_fast()) and builds analysis-stage
    Kaplan-Meier curves (kmcurve_fast()), each with plot and print methods.
    All functions are designed for repeated
    evaluation inside large simulation loops, such as adaptive sample-size
    re-estimation, probability-of-success calculations, and regional consistency
    evaluation in multi-regional trials. Core computations are implemented in
    'C++' via 'Rcpp' for maximum performance. Methodological background is
    described in Collett (2014, ISBN:9780429196294).
License: MIT + file LICENSE
URL: https://github.com/gosukehommaEX/FastSurvival,
        https://gosukehommaEX.github.io/FastSurvival/
BugReports: https://github.com/gosukehommaEX/FastSurvival/issues
Encoding: UTF-8
Language: en-US
Depends: R (>= 4.1.0)
Imports: graphics, grDevices, stats, dqrng, Rcpp, mvtnorm
LinkingTo: Rcpp, dqrng
Suggests: survival, survRM2, survAH, simtrial, gsDesign, rpact, nph,
        nphRCT, microbenchmark, testthat (>= 3.0.0), knitr, rmarkdown
Config/testthat/edition: 3
Config/roxygen2/version: 8.0.0
VignetteBuilder: knitr
NeedsCompilation: yes
Packaged: 2026-07-27 03:48:43 UTC; i_lik
Author: Gosuke Homma [aut, cre]
Maintainer: Gosuke Homma <my.name.is.gosuke@gmail.com>
Repository: CRAN
Date/Publication: 2026-07-27 11:50:02 UTC
Built: R 4.6.1; x86_64-w64-mingw32; 2026-07-27 23:51:49 UTC; windows
Archs: x64
