Data in R Packages

To include data in an R package, use `usethis::use_data()` to save exported datasets to the `data/` directory, `use_data_raw()` for raw files in `inst/extdata/`, and `R/sysdata.rda` for internal data.

Documenting R package datasets requires using `roxygen2` syntax within an `R/data.R` script, which generates the standard help files ensuring your data is discoverable and clearly described for users.

Manage internal data by saving it to `R/sysdata.rda` using `usethis::use_data(internal = TRUE)`, whereas exported data goes to the `data/` directory to be directly accessible to package users.

CRAN imposes strict size limitations on R packages, meaning you must carefully manage large datasets, often compressing data or using lazy-loading techniques to ensure your package remains compliant.

Use `inst/extdata/` for raw files when you need to provide unprocessed source data or examples that users can access via `system.file()`, keeping it separate from formatted exported datasets.

Handle dynamic package state management in R by utilizing environments, which allow you to store and modify package-level state persistently across user sessions without violating standard scoping rules.