Extract all numbers from a single string in R

Question

Let\'s imagine you have a string:

strLine <- \"The transactions (on your account) were as follows: 0 3,000 (500) 0 2.25 (1,200)\"

Is the

Answer 1

Since this came up in another question, this is an uncrutched stringi solution (vs the stringr crutch):

as.numeric(
  stringi::stri_replace_first_fixed(
    stringi::stri_replace_all_regex(
      unlist(stringi::stri_match_all_regex(
        "The transactions (on your account) were as follows: 0 3,000 (500) 0 2.25 (1,200)", 
        "\\(?[0-9,.]+\\)?"
      )), "\\)$|,", ""
    ),
    "(", "-"
  )
)