A character vector of symbols (i.e.,
punctuation) that strip should keep.
The default is to strip every symbol except apostrophes
and a double tilde "~~". The double tilde
digit.remove
logical. If TRUE strips
digits from the text.
apostrophe.remove
logical. If TRUE removes
apostrophes from the output.
lower.case
logical. If TRUE forces all
alpha characters to lower case.
Value
Returns a vector of text that has been stripped of unwanted
characters.