> -----Original Message-----
> > x<-"/mnt/AO/AO Data/S01-012/120824/"
>
> I would like to extract "S01-012"
> gsub("/mnt/AO/AO Data/(.+)/.+", "\\1", x)
#does it, as does
> gsub("/mnt/AO/AO Data/([\\w-]+)/.+", "\\1", x, perl=TRUE) # \w is perl RE;
> the default is POSIX, which would be.
> gsub("/mnt/AO/AO Data/([[:alnum:]-]+)/.+", "\\1", x)
#and
> str_match(x,"/mnt/AO/AO Data/(.+)/.+")
> str_match(x,"/mnt/AO/AO Data/([[:alnum:]-]+)/.+") #again, needs POSIX, not
> perl RE
You had also, btw, missed the '.' in the closing '.+', meaning that your regex
was looking for '/+', that is, multiple instances of '/'
Steve E
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