Does R support [:punct:] in regexps?

2 messages · Daniel Brewer, Duncan Murdoch

Thu, Apr 9, 2009 4:10 AM #

Hello does R support [:punct:] in regular expressions?  I am trying to
strip all regular expressions for a vector of strings.

[1] "yoda-yoda" "billy!"

Thanks

Dan

**************************************************************
Daniel Brewer, Ph.D.

Institute of Cancer Research
Molecular Carcinogenesis
Email: daniel.brewer at icr.ac.uk
**************************************************************

The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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Duncan Murdoch

Thu, Apr 9, 2009 4:31 AM #

On 09/04/2009 7:10 AM, Daniel Brewer wrote:

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