[R] time extraction and normalization

R. Michael Weylandt
Mon, 15 Oct 2012 22:09:26 -0000

Use something like

format(as.POSIXct(xxx, format = "STRING"), format =
"STRING2")

where the appropriate formatting codes can be worked out using the
info in ?strptime

Cheers,
Michael

On Mon, Oct 15, 2012 at 9:32 PM, york8866 <yu_york at hotmail.com>
wrote:
> Dear all,
>
> I have a series of time variables such as:
>
> 04MAY2011:08:19:00
> 01JUN2011:09:44:00
> 28JUN2011:08:08:00
> 25JUL2011:07:44:00
>
>
> How could I extract the time as a number, so that I can normalize the times
> by the first time variable?
>
> Thanks,
>
>
>
>
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/time-extraction-and-normalization-tp4646275.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at 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.