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).
| Version: | 0.2.0 |
| 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 |
| Published: | 2026-07-27 |
| DOI: | 10.32614/CRAN.package.FastSurvival |
| Author: | Gosuke Homma [aut, cre] |
| Maintainer: | Gosuke Homma <my.name.is.gosuke at gmail.com> |
| BugReports: | https://github.com/gosukehommaEX/FastSurvival/issues |
| License: | MIT + file LICENSE |
| URL: | https://github.com/gosukehommaEX/FastSurvival, https://gosukehommaEX.github.io/FastSurvival/ |
| NeedsCompilation: | yes |
| Language: | en-US |
| Materials: | README, NEWS |
| CRAN checks: | FastSurvival results |
| Package source: | FastSurvival_0.2.0.tar.gz |
| Windows binaries: | r-devel: FastSurvival_0.1.0.zip, r-release: FastSurvival_0.1.0.zip, r-oldrel: FastSurvival_0.1.0.zip |
| macOS binaries: | r-release (arm64): FastSurvival_0.2.0.tgz, r-oldrel (arm64): FastSurvival_0.2.0.tgz, r-release (x86_64): FastSurvival_0.2.0.tgz, r-oldrel (x86_64): FastSurvival_0.2.0.tgz |
| Old sources: | FastSurvival archive |
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