exclude dot with regular expression in R

Question

i got a string vector from list.files() in R and want to exclude the strings with dot (.). the codes are as follows

list.files(R.home(),pattern='[^\\.]') 
list.files(R.home(),pattern='[^.]')

they all don't work. any help is appreciated!

Answer 1

consider using:

 list.files(pattern = "^[^.]+$")

This ensures there is no . from the beginning to the end of the string.