a character string to separate the tokens when n > 1
ignoreCase
logical: treat text as-is (FALSE) or convert to all lowercase
(true); Default is TRUE. Note that if the stemming is set to
TRUE, tokens will always be converted to lowercase, so this option
will be ignored.
delimiter
character or string that divides one word from the next.
You can use a regular expression as the delimiter value.
punctuation
a regular expression that specifies the punctuation characters
parser will remove before it evaluates the input text.
stemming
logical: If true, apply Porter2 Stemming to each token to reduce
it to its root form. Default is FALSE.
stopWords
logical or string with the name of the file that contains stop words.
If TRUE then that should
be ignored when parsing text. Each stop word is specified on a separate line.
sep
a character string to separate multiple text columns.