13.6 DPLYR: Grammar of data management (Hadley Wickham)

  • Functions
    • filter(): Select a subset of the rows of a data frame (see also slice())
    • arrange(): Reorders the rows of a data frame
    • select(): Selects columns (can be used for renaming, see rename())
    • distinct(): Returns unique values in a table
    • mutate(): Add new columns to existing columns (see also transmute())
    • summarise(): Collapses a data frame to a single row (e.g. aggregation)
    • group_by(): Break data set into groups (of rows), to apply above functions to each group