Actuarial Helpers for Triangles, Exposures and Czech Birth Numbers R package vitopack version 0.1.1 A collection of utilities that grew out of day-to-day non-life actuarial work at Com-PASS Advisory. Provides helpers for building chain-ladder triangles (cumulative, decumulative, run-off, development factors with optional weighting), constructing exposure columns from policy start/end dates, parsing Czech birth numbers ('rodné číslo') into dates, generating smooth RGB color palettes for charts, and loading multi-sheet 'xlsx'/'xlsb' files into a list of data frames. The chain-ladder helpers follow the standard methodology of Mack (1993) <doi:10.2143/AST.23.2.2005092>. Software Depends: R (>= 4.1.0) Imports: data.table, dplyr, tibble, tidyselect, rlang, lubridate, grDevices, graphics, stats, utils Suggests: readxl, plotly, testthat (>= 3.0.0), knitr, rmarkdown, covr Ondřej Vít <ondrej.vit@com-pass.cz> Comprehensive R Archive Network (CRAN) Ondřej Vít [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=vitopack/LICENSE) 2026-05-12 application/tgz https://CRAN.R-project.org/package=vitopack doi:10.32614/CRAN.package.vitopack en-US