which_pattern: Which regex pattern first matches the string

In avidclam/avidstart: Useful R helper functions for quick start of data analysis projects

Description

For each element in the string vector, this function finds which pattern is the first to match it using grepl. Thus pattern order influences the results.

Usage

which_pattern(string, pattern)

Arguments

string	vector of strings to match against patterns
pattern	vector of patterns to match strings

Value

Numeric index of the pattern to first match each string or NA

Examples

which_pattern(month.name, c("^J", "[A,a]", "[O,o]"))
# [1]  1  2  2  2  2  1  1  2 NA  3  3 NA

which_pattern(month.name, c("[A,a]", "^J", "[O,o]"))
#[1]  1  1  1  1  1  2  2  1 NA  3  3 NA

avidclam/avidstart documentation built on May 17, 2019, 10:01 a.m.