Appendix A — Useful functions

A.1 Importing data

• read.csv()
• read.csv2()
• readr::read_csv()
• readr::read_csv2()
• readr::read_delim()
• readr::read_rds()
• haven::read_sav()
• haven::read_dta()
• haven::read_delim()
• readxl::read_excel()
• openxlsx::read.xlsx()

A.2 Getting an idea of the data

• nrow()
• ncol()
• summary()
• dplyr::glimpse()

A.3 Describing data

• summary()
• table()
• janitor::tabyl()
• mean()
• median()
• sd()

A.4 Manipulate data

• dplyr::count()
• dplyr::select()
• dplyr::filter()
• dplyr::arrange()
• dplyr::mutate()
• dplyr::group_by()
• dplyr::summarise()
• dplyr::rename()
• dplyr::rename()
• dplyr::slice_min()
• dplyr::slice_max()

A.5 Clean and recode

• tidyr::pivot_longer()
• tidyr::pivot_wider()

A.6 Testing bivariate relationships

• t.test()
• cor()

A.7 Modelling

• lm()
• broom::tidy()
• broom::glance()
• broom::augment()