CODEWITHSUNDEEP
rregex
sharkonaut
sharkonaut

Reputation: 35

Regex function in R that will only detect first six numbers?

I need to find Regex that has to be implemented in R to detect the first six numbers in this test case and output TRUE/FALSE.

test_case = c('401 501', '401-501', '(401)501', '401501', '+401501', '4011501')

I've tried this function:

str_detect(test_case, regex('^[- + \\d]{6}'))

but I can't quite get the outputs to appear as so:

TRUE TRUE TRUE TRUE FALSE FALSE

Upvotes: 1

Views: 61

Answers (2)

Rui Barradas
Rui Barradas

Reputation: 76402

This seems to do it:

grepl('^[-\\(\\) ]*[[:digit:]]{3}[-\\(\\) ]*[[:digit:]]{3}$', test_case)
#[1]  TRUE  TRUE  TRUE  TRUE FALSE FALSE

Upvotes: 0

Ronak Shah
Ronak Shah

Reputation: 388862

You can remove the additional characters that you want to allow in data and then check if the vector has exactly 6 digits.

grepl('^\\d{6}$', gsub('[() -]', '', test_case))
#[1]  TRUE  TRUE  TRUE  TRUE FALSE FALSE

Same logic implemented in stringr :

library(stringr)
str_detect(str_remove_all(test_case, '[() -]'), '^\\d{6}$')

Upvotes: 1

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