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REGEXPREP Regular Expression Replacement Function

Section: String Functions

# Usage

Replaces regular expressions in the provided string. The syntax for its use is

      outstring = regexprep(instring,pattern,replacement,modes)

Here `instring` is the string to be operated on. And `pattern` is a regular expression of the type accepted by `regexp`. For each match, the contents of the matched string are replaced with the replacement text. Tokens in the regular expression can be used in the replacement text using `$N` where `N` is the number of the token to use. You can also specify the same `mode` flags that are used by `regexp`.