strip function

Strip Text

Strip text of unwanted characters.

strip(
  x,
  char.keep = "~~",
  digit.remove = TRUE,
  apostrophe.remove = TRUE,
  lower.case = TRUE
)

## S3 method for class 'character'
strip(
  x,
  char.keep = "~~",
  digit.remove = TRUE,
  apostrophe.remove = TRUE,
  lower.case = TRUE
)

## S3 method for class 'factor'
strip(
  x,
  char.keep = "~~",
  digit.remove = TRUE,
  apostrophe.remove = TRUE,
  lower.case = TRUE
)

## Default S3 method:
strip(
  x,
  char.keep = "~~",
  digit.remove = TRUE,
  apostrophe.remove = TRUE,
  lower.case = TRUE
)

## S3 method for class 'list'
strip(
  x,
  char.keep = "~~",
  digit.remove = TRUE,
  apostrophe.remove = TRUE,
  lower.case = TRUE
)

Arguments

• x: The text variable.
• char.keep: 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 "~~" is included for a convenient means of keeping word groups together in functions that split text apart based on spaces. To remove double tildes "~~" set char.keep to NULL.
• 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.

Returns

Returns a vector of text that has been stripped of unwanted characters.

Examples

## Not run:

DATA$state #no strip applied
strip(DATA$state)
strip(DATA$state, apostrophe.remove=FALSE)
strip(DATA$state, char.keep = c("?", "."))
## End(Not run)

See Also

rm_stopwords