Try this:
sub("\\.(\\d+)$", "\\1", ts)
On Thu, Mar 17, 2011 at 11:01 PM, rivercode <aqua...@gmail.com> wrote:
>
> Have timestamp in format HH:MM:SS.MMM.UUU and need to remove the last "." so
> it is in format HH:MM:SS.MMMUUU.
>
> What is the fastest way to do this, since it has to be repeated on millions
> of rows. Should I use regex ?
>
> Currently doing it with a string split, which is slow:
>
> >head(ts)
> [1] 09:30:00.000.245 09:30:00.000.256 09:30:00.000.633 09:30:00.001.309
> 09:30:00.003.635 09:30:00.026.370
>
>
> ts = strsplit(ts, ".", fixed = TRUE)
> ts=lapply(ts, function(x) { paste(x[1], ".", x[2], x[3], sep="") } ) #
> Remove last . from timestamp, from HH:MM:SS.MMM.UUU to HH:MM:SS.MMMUUU
> ts = unlist(ts)
>
> Thanks,
> Chris
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/Replace-split-with-regex-for-speed-tp3386098p3386098.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
