clean                   Clean column data to a class
currency                Transform to currency
format_datetime         Readable date format to POSIX
format_names            Format names and values
format_p_value          Format p values (APA guideline)
freq                    Frequency table
na_replace              Replace NA values
percentage              Transform to percentage
rdate                   Generate random dates
regex_true_false        Regular expressions for 'TRUE' and 'FALSE'
unclean                 Example data that is not clean
