billboard Song rankings for Billboard top 100 in the year 2000 chop Chop and unchop cms_patient_experience Data from the Centers for Medicare & Medicaid Services complete Complete a data frame with missing combinations of data construction Completed construction in the US in 2018 drop_na Drop rows containing missing values expand Expand data frame to include all possible combinations of values expand_grid Create a tibble from all combinations of inputs extract Extract a character column into multiple columns using regular expression groups fill Fill in missing values with previous or next value fish_encounters Fish encounters full_seq Create the full sequence of values in a vector gather Gather columns into key-value pairs hoist Hoist values out of list-columns household Household data nest Nest rows into a list-column of data frames nest_legacy Legacy versions of 'nest()' and 'unnest()' pack Pack and unpack pivot_longer Pivot data from wide to long pivot_wider Pivot data from long to wide relig_income Pew religion and income survey replace_na Replace NAs with specified values separate Separate a character column into multiple columns with a regular expression or numeric locations separate_longer_delim Split a string into rows separate_rows Separate a collapsed column into multiple rows separate_wider_delim Split a string into columns smiths Some data about the Smith family spread Spread a key-value pair across multiple columns table1 Example tabular representations uncount "Uncount" a data frame unite Unite multiple columns into one by pasting strings together unnest Unnest a list-column of data frames into rows and columns unnest_longer Unnest a list-column into rows unnest_wider Unnest a list-column into columns us_rent_income US rent and income data who World Health Organization TB data world_bank_pop Population data from the World Bank