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.