R4DS Ch. 5

group_by()

{dplyr}

group data by levels of column

any_of()

{tidyselect}

check if any any elements are found in vector

num_range()

{tidyselect}

match column names with number range

mutate()

{dplyr}

create or modify data columns

select()

{dplyr}

keep specified columns

ends_with()

{tidyselect}

match column names that end with string

filter()

{dplyr}

keep rows based on values of columns

contains()

{tidyselect}

match column names that contain string

rename()

{dplyr}

rename columns

arrange()

{dplyr}

change order of rows based on values of columns

starts_with()

{tidyselect}

match column names that begin with string

n()

{dplyr}

return current group size

count()

{dplyr}

count unique values of variables

summarize()

{dplyr}

summarize data usually by grouping variable

desc()

{dplyr}

order in descending order

ungroup()

{dplyr}

remove grouping

The end!