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Developing R Packages

Jasmin Ludolf

Content Developer

Chapter 1 review

• R package structure: directories, DESCRIPTION, NAMESPACE
  • usethis::create_package()
• Including data in the package
  • usethis::use_data()
• Writing R functions for package development
  • dump()
• Installing and testing the package locally
  • devtools::install()

Chapter 2 review

• Compare packages vs. scripts
• Choose informative package name
• Check package name availability on CRAN
  • available::available()
• Explore different license options
  • usethis::use_mit_license()
• Load package components and check packages
  • devtools::load_all() and devtools::check()

Chapter 3 review

• Help file components and exported functions
• Importance of examples in documentation
• Creating function examples with roxygen2
  • roxygen2::roxygenize()
• Understanding purpose of vignettes
• Browsing and assessing vignettes
  • browseVignettes()
• Designing and building vignettes
  • usethis::use_vignette() and devtools::build_vignettes()

Chapter 4 review

• Recognizing and creating unit tests
  • usethis::use_testthat() and usethis::use_test()
• Exploring expect statements for testing
  • testthat::expect_equal() andtestthat::expect_error()
• Organizing and running unit tests
  • testthat::test_that()
• Updating package metadata and documentation
• Discussing package versioning
• Running a package check
  • devtools::check()

Next steps

• Sharing your package online/with others
• Using devtools::release() for package release to CRAN
• Implementing continuous integration for your package

Hooray!

Developing R Packages