miscset (version 0.4)

gregexprind: Pattern Matching and Extraction

Description

Function to extract a certain index from gregexpr().

Usage

gregexprind(pattern, text, n, ...)

Arguments

pattern

Character string containing a regular expression to be searched in text.

text

Character vector where the search is performed.

n

Numeric value or character string "last" to extract nth or last position of pattern in each value of text.

...

Arguments passed to function gregexpr().

Value

• Numeric vector of length length(text).

Details

See ?gregexpr for further information on arguments. See ?"regular expression" for the use of regular expressions.

See Also

gregexpr, regular expression (regex)

Examples

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gregexprind(c("a"),c("abab","ab","xyz",NA), 1)
gregexprind(c("a"),c("abab","ab","xyz",NA), 2)
gregexprind(c("a"),c("abab","ab","xyz",NA), "last")

#