Regex in R (str_detect) -


what must painfully obvious error expert: how match location of bracket digit pattern in following strings stringr?

library(stringr)  s <- c("ser ser (1 ( asd",        "ser (3 (. asd",        "ser ser (1 (2 asd")

i want match pattern "(", digit. think right regex "\(\d" command

str_detect(s[1], "\(\d")

provides

error: '\(' unrecognized escape in character string starting ""\("

what's right way write regular expression?

you need escape slashes in r strings

str_detect(s[1], "\\(\\d")

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