add_totals_col          Append a totals column to a data.frame.
add_totals_row          Append a totals row to a data.frame.
adorn_crosstab          Add formatting to a crosstabulation table.
clean_names             Cleans names of a data.frame.
convert_to_NA           Convert string values to true 'NA' values.
crosstab                Generate a crosstabulation of two vectors.
excel_numeric_to_date   Convert dates encoded as serial numbers to Date
                        class.
get_dupes               Get rows of a 'data.frame' with identical
                        values for the specified variables.
janitor                 janitor
ns_to_percents          Convert a numeric data.frame to row-, column-,
                        or totals-wise percentages.
remove_empty_cols       Removes empty columns from a data.frame.
remove_empty_rows       Removes empty rows from a data.frame.
tabyl                   Generate a frequency table from a vector.
top_levels              Generate a frequency table of a factor grouped
                        into top-n, bottom-n, and all other levels.
use_first_valid_of      Returns first non-NA value from a set of
                        vectors.
