how to check if a string contains at least one numeric character in R [duplicate]

Answer 1

using \\d works for me:

grepl("\\d", mywords)
[1] FALSE FALSE FALSE  TRUE  TRUE  TRUE

so does [[:digit:]]:

grepl("[[:digit:]]", mywords)
[1] FALSE FALSE FALSE  TRUE  TRUE  TRUE

As @nrussel mentionned, you're testing if the strings contain only digits between the beginning ^ of the string till the end $.

You could also check if the strings contain something else than letters, using ^ inside brackets to negate the letters, but then "something else" is not only digits:

grepl("[^a-zA-Z]", mywords)
[1] FALSE FALSE FALSE  TRUE  TRUE  TRUE