Extract phone number regex
r, regex
Solution
This is the best I've been able to do- you have a pretty wide range of formats, including some with spaces, so the regex is pretty general. It just says "look for a string of at least 5 characters made up entirely of digits, periods, brackets, hyphens or spaces":
library(stringr)
str_extract_all(x, "(^| )[0-9.() -]{5,}( |$)")
Output:
[[1]]
[1] " 2-613-213-4567 " " 5555555555 "
[[2]]
[1] " 613 213 4567"
[[3]]
[1] " (613)2134567"
[[4]]
[1] "1.575.555.5555 "
[[5]]
[1] "7164347566"
The leading/trailing spaces could probably be fixed with some additional complexity, or you could just fix it in post.
Update: a bit of searching lead me to this answer, which I slightly modified to allow periods. A bit stricter in terms of requiring a valid (US?) phone number, but seems to cover all your examples:
str_extract_all(x, "\\(?\\d{3}\\)?[.-]? *\\d{3}[.-]? *[.-]?\\d{4}")
Output:
[[1]]
[1] "613-213-4567" "5555555555"
[[2]]
[1] "613 213 4567"
[[3]]
[1] "(613)2134567"
[[4]]
[1] "575.555.5555"
[[5]]
[1] "7164347566"
The monstrosity found here also works once you take out the `^` and `$` at either end. Use only if you really need it:
huge_regex = "(?:(?:\\+?1\\s*(?:[.-]\\s*)?)?(?:\\(\\s*([2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9])\\s*\\)|([2-9]1[02-9]|[2-9][02-8]1|[2-9][02-8][02-9]))\\s*(?:[.-]\\s*)?)?([2-9]1[02-9]|[2-9][02-9]1|[2-9][02-9]{2})\\s*(?:[.-]\\s*)?([0-9]{4})(?:\\s*(?:#|x\\.?|ext\\.?|extension)\\s*(\\d+))?"
Problem
How can I extract phone numbers from a text file? ``` x <- c(" Mr. Bean bought 2 tickets 2-613-213-4567 or 5555555555 call either one", "43 Butter Rd, Brossard QC K0A 3P0 – 613 213 4567", "Please contact Mr. Bean (613)2134567", "1.575.555.5555 is his #1 number", "7164347566" ) ``` This is a question that's been answered for other languages (see php abd general regex) but doesn't seem to have been tackled on SO for R. I have searched and found what appears to be possible regexes to find phone numbers (In addition to the regexes from other languages above): http://regexlib.com/Search.aspx?k=phone but have not been able to use `gsub` within R with these to extract all of these numbers in the example. Ideally, we'd get something like: ``` [[1]] [1] "2-613-213-4567" "5555555555" [[2]] [1] "613 213 4567" [[3]] [1] "(613)2134567" [[4]] [1] "1.575.555.5555" [[5]] [1] "7164347566" ```