How would I just select a few varaibles using regexp

flag = 'KLAX 312353Z 27009KT 10SM FEW200 18/10 A3007 RMK AO2 SLP182 T01780100 10217 20178 55007'

METAR changes the amount of variables usually when reported I was hoping to get someone thought on how to do this using regexp.

I was thinking about using the regexp to find A3007. I know there are other ways, but I would like to learn how to use regexp.

This is what I have so far regexp(flag, A\4[0123456789]).

Answer 1

[Walter Roberson]

regexp(flag, 'A\d{4}', 'match')