a character vector of the same length and with the same attributes as x (after possible coercion to character).
Arguments
pattern
character string containing a regular expression (or character string for fixed = TRUE) to be matched in the given character vector. Coerced by as.character to a character string if possible.
replacement
a replacement for matched pattern as in sub and gsub.
See there for more information.
x
a character vector where matches are sought, or an object which can be coerced by as.character to a character vector. Long vectors are supported.