qdap (version 0.2.5)

stopwords: Remove Stopwords

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("e

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 TRUE strips the text of all punctuation except apostrophes.

unique

logical. If TRUE keeps only unique words (if unlist is TRUE) 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)