Replace string using regular expression

Replace string using regular expression.

regexprep(s, expr, repstr, ignorecase = FALSE, once = FALSE)

Arguments

s

Single character string.

expr

Regular expression to be matched.

repstr

String that replaces the matched substring(s).

ignorecase

logical, whether to ignore case.

once

logical, shall only the first or all occurences be replaced.

Details

Matches the regular expression against the string and replaces the first or all non-overlapping occurrences with the replacement string.

The syntax for regular expression has to be PERL-like.

Value

String with substrings replaced.

Note

The Matlab/Octave variant allows a character vector. This is not possible here as it would make the return value quite complicated.

See also

gsub

Examples

s <- "bat cat can car COAT court cut ct CAT-scan"
pat <-  'c[aeiou]+t'
regexprep(s, pat, '---')
#> [1] "bat --- can car COAT court --- ct CAT-scan"
regexprep(s, pat, '---', once = TRUE)
#> [1] "bat --- can car COAT court cut ct CAT-scan"
regexprep(s, pat, '---', ignorecase = TRUE)
#> [1] "bat --- can car --- court --- ct ----scan"