stopwords: Remove Stopwords

In trinker/qdap2: Bridging the gap between qualitative data and quantitative analysis

Description

Transcript apply the removal of stopwords.

Usage

  stopwords(textString, stopwords = Top25Words,
    unlist = FALSE, separate = TRUE, strip = FALSE,
    unique = FALSE, char.keep = NULL, names = FALSE,
    ignore.case = TRUE, apostrophe.remove = FALSE, ...)

Arguments

textString	A character string of text or a vector of character strings.
stopwords	A character vector of words to remove from the text. qdap has a number of data sets that can be used as stopwords including: Top200Words, Top100Words, Top25Words. For the tm package's traditional English stop words use tm::stopwords("english")
unlist	logical. If TRUE unlists into one vector. General use intended for when separate is FALSE.
separate	logical. If TRUE separates sentences into words. If FALSE retains sentences.
strip	logical. IF TURE strips the text of all punctuation except apostrophes.
unique	logical. If TRUE keeps only unique words (if unlist is TURE) or sentences (if unlist is FALSE). General use intended for when unlist is TRUE.
char.keep	If strip is TRUE this argument provides a means of retaining supplied character(s).
names	logical. If TRUE will name the elements of the vector or list with the original textString.
ignore.case	logical. If TRUE stop words will be removed regardless of case. Additionally, case will be stripped from the text. If FALSE stopwords removal is contingent upon case. Additionally, case is not stripped.
apostrophe.remove	logical. If TRUE removes apostrophe's from the output.
...	further arguments passed to strip function

Value

Returns a vector of sentences, vector of words, or (default) a list of vectors of words with stop words removed. Output depends on supplied arguments.

See Also

strip, bag.o.words, stopwords

Examples

stopwords(DATA$state)
stopwords(DATA$state, tm::stopwords("english"))
stopwords(DATA$state, Top200Words)
stopwords(DATA$state, Top200Words, strip = TRUE)
stopwords(DATA$state, Top200Words, separate = FALSE)
stopwords(DATA$state, Top200Words, separate = FALSE, ignore.case = FALSE)
stopwords(DATA$state, Top200Words, unlist = TRUE)
stopwords(DATA$state, Top200Words, unlist = TRUE, strip=TRUE)
stopwords(DATA$state, Top200Words, unlist = TRUE, unique = TRUE)

trinker/qdap2 documentation built on May 31, 2019, 9:47 p.m.