invert_match: Switch location of matches to location of non-matches.

Description Usage Arguments Value Examples

Description

Invert a matrix of match locations to match the opposite of what was previously matched.

Usage

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Arguments

loc

matrix of match locations, as from str_locate_all()

Value

numeric match giving locations of non-matches

Examples

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numbers <- "1 and 2 and 4 and 456"
num_loc <- str_locate_all(numbers, "[0-9]+")[[1]]
str_sub(numbers, num_loc[, "start"], num_loc[, "end"])

text_loc <- invert_match(num_loc)
str_sub(numbers, text_loc[, "start"], text_loc[, "end"])

Example output

[1] "1"   "2"   "4"   "456"
[1] ""      " and " " and " " and " ""     

stringr documentation built on May 2, 2019, 11:03 a.m.