Switch location of matches to location of non-matches.
Invert a matrix of match locations to match the opposite of what was previously matched.
invert_match(loc)
loc |
matrix of match locations, as from |
numeric match giving locations of non-matches
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"])
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