refindall: Find overlapping regular expression matches.
In pracma: Practical Numerical Math Functions

refindall

R Documentation

Find overlapping regular expression matches.

Description

Find overlapping matches for a regular expression.

Usage

refindall(s, pat, over = 1, ignorecase = FALSE)

Arguments

`s`	Single character string.
`pat`	Regular expression.
`over`	Natural number, indication how many steps to go forward after a match; defaults to 1.
`ignorecase`	logical, whether to ignore case.

Details

Returns the starting position of all — even overlapping — matches of the regular expression pat in the character string s.

The syntax for pattern matching has to be PERL-like.

Value

A numeric vector with the indices of starting positions of all matches.

Note

This effect can also be reached with the R function gregexpr(), see the example below.

Examples

refindall("ababababa", 'aba')
gregexpr('a(?=ba)', "ababababa", perl=TRUE)

refindall("AbababaBa", 'aba')
refindall("AbababaBa", 'aba', ignorecase = TRUE)

pracma documentation built on Nov. 10, 2023, 1:14 a.m.