Error in stri_detect_regex in R

Question

I am receiving this error

Error in stri_detect_regex(string, pattern, opts_regex = opts(pattern)) : Incorrectly nested parentheses in regexp patt

Answer 1

Since you are using fixed strings, not regular expressions, you need to tell the regex engine to use the patterns as plain, literal text. You can use it like this:

str_detect(final_RN$named_RN, fixed(x))
                              ^^^^^^^^

See "Fixed matches":

fixed(x) only matches the exact sequence of bytes specified by x. This is a very limited “pattern”, but the restriction can make matching much faster.

You might also consider coll(x) in case you want to use human-language collation rules while performing a case insensitive search.