Remove/Replace/Extract Endmarks

Usage

rm_endmark(text.var, trim = !extract, clean = TRUE, pattern = "@rm_endmark", replacement = "", extract = FALSE, dictionary = getOption("regex.library"), ...)

Arguments

text.var
The text variable.
trim
logical. If TRUE removes leading and trailing white spaces.
clean
trim logical. If TRUE extra white spaces and escaped character will be removed.
pattern
A character string containing a regular expression (or character string for fixed = TRUE) to be matched in the given character vector. Default, @rm_endmark uses the rm_dollar regex from the regular expression dictionary from the dictionary argument.
replacement
Replacement for matched pattern.
extract
logical. If TRUE the endmark strings are extracted into a list of vectors.
dictionary
A dictionary of canned regular expressions to search within if pattern begins with "@rm_".
...
Other arguments passed to gsub.

Value

Returns a character string with endmarks removed.

Description

Remove/replace/extract endmarks from a string.

Details

The default regular expression used by rm_endmark finds endmark punctuation used in the qdap package; this includes ! . ? * AND |. This behavior can be altered (to ; AND : or to use just ! . AND ?) by using a secondary regular expression from the regex_usa data (or other dictionary) via (pattern = "@rm_endmark2" or pattern = "@rm_endmark3"). See Examples for example usage.

Examples

x <- c("I like the dog.", "I want it *|", "I;", "Who is| that?", "Hello world", "You...") rm_endmark(x)
[1] "I like the dog" "I want it" "I;" "Who is| that" "Hello world" "You"
rm_endmark(x, extract=TRUE)
[[1]] [1] "." [[2]] [1] "*|" [[3]] [1] NA [[4]] [1] "?" [[5]] [1] NA [[6]] [1] "..."
rm_endmark(x, pattern="@rm_endmark2")
[1] "I like the dog" "I want it *|" "I;" "Who is| that" "Hello world" "You"
rm_endmark(x, extract=TRUE, pattern="@rm_endmark2")
[[1]] [1] "." [[2]] [1] NA [[3]] [1] NA [[4]] [1] "?" [[5]] [1] NA [[6]] [1] "..."
rm_endmark(x, pattern="@rm_endmark3")
[1] "I like the dog" "I want it" "I" "Who is| that" "Hello world" "You"
rm_endmark(x, extract=TRUE, pattern="@rm_endmark3")
[[1]] [1] "." [[2]] [1] "*|" [[3]] [1] ";" [[4]] [1] "?" [[5]] [1] NA [[6]] [1] "..."