[R] Does R support [:punct:] in regexps?

Duncan Murdoch
2009-04-09T11:31:28Z

On 09/04/2009 7:10 AM, Daniel Brewer wrote:
> Hello does R support [:punct:] in regular expressions?  I am trying to
> strip all regular expressions for a vector of strings.

It does, but remember that the [] chars are part of the character class;
you need extra [] brackets around the whole thing, and you don't want
the slash delimiters:

 > x <- c("yoda-yoda","billy!")
 > gsub("[[:punct:]]","",x)
[1] "yodayoda" "billy"

Duncan Murdoch

>
>> x <- c("yoda-yoda","billy!")
>> gsub("/[:punct:]/","",x)
> [1] "yoda-yoda" "billy!"
>
> Thanks
>
> Dan