r-package-development

To specify R package dependencies in the DESCRIPTION file, you declare required external packages under the Imports or Depends fields, ensuring your package functions load correctly and maintain robust dependency management.

The best way to generate R package documentation is using roxygen2 to write inline code comments, which automatically creates manual pages and ensures your API design is well-documented and easy for others to use.

You set up unit testing for an R library by using the testthat framework to write and run test cases, ensuring code quality, verifying function interfaces, and preventing regressions during package development.

You should use external packages versus base R when an external library provides necessary functionality that simplifies API design and error handling, while relying on base R minimizes heavy dependency management for simpler tasks.

To design a user-friendly function interface for an R package, you apply API design patterns that ensure robust parameter handling, clear error messaging, and intuitive function naming for maintainable R libraries.