The grouping variables. Default NULL generates
one word list for all text. Also takes a single grouping variable or a list
of 1 or more grouping variables.
n
The max number of grams calculate
...
Further arguments passed to strip function.
Value
Returns a list of:
rawA list of pasted single vectors of the ngrams per row.
groupA list of pasted vectors of ngrams grouped by grouping.var.
unlist1A list of a single vector of pasted ngrams per grouping.var in the order used.
unlist2A list of a single vector of pasted ngrams per grouping.var in alphabetical order.
group_nA list of a list of vectors of ngrams per grouping.var & n (not pasted).
allA single vector of pasted ngrams sorted alphabetically.
all_nA list of lists a single vectors of ngrams sorted alphabetically (not pasted).