[R] regexpr virtue

[Gabor Grothendieck]

Here are a couple of possibilities:

sub(".*\\.", "", s)

library(gsubfn)
strapply(s, "[0-9]*$", simplify = c)



On Wed, Jul 29, 2009 at 9:10 AM, Petr PIKAL<petr.pikal at precheza.cz> wrote:
> Hi all
>
> I have got something like that (actually those are column names)
>
> [51] "X19.2.300b...80"          "X19.2.400v...80" "X19.2.400b...80"
> "X19.2.300v...90"          "X19.2.300b...90"
> [56] "X19.2.400v...90"          "X19.2..400b..90" "X19.2.300v...100"
> "X19.2.300b...100"         "X19.2.400v...100"
>
> in character vector. I would like to get last n figures from this
> character vector but my regexpr unerstanding is inferior and I did not
> succeed.
> Please, is there anybody who can extract those n digits from end of each
> character string? If there were only 2 digits I could use substr but there
> can be one, two or three digits.
>
> I tried several variations of
>
> gsub("0:9$", "\\1" ,names(foto)[10])
>
> but either got whole string or an error.
>
> Best regards
> Petr
>
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