If you want to use regular expressions, try:
> x
V1 V2 V3 V4
1 1 2009-06-20 00:53:00 73
2 2 2009-06-20 01:08:00 73
3 3 2009-06-20 01:44:00 72
4 4 2009-06-20 01:53:00 71
5 5 2009-06-20 02:07:00 72
> x[grep(":53:", x$V3),]
V1 V2 V3 V4
1 1 2009-06-20 00:53:00 73
4 4 2009-06-20 01:53:00 71
>
On Mon, Jun 22, 2009 at 8:58 PM, Keith Jones <keit...@keithljelp.com> wrote:
> Hi,
>
> I have a data frame with two columns: dt and tf. The dt column is datetime
> and the tf column is a temperature.
>
> dt tf
> 1 2009-06-20 00:53:00 73
> 2 2009-06-20 01:08:00 73
> 3 2009-06-20 01:44:00 72
> 4 2009-06-20 01:53:00 71
> 5 2009-06-20 02:07:00 72
> ...
>
> I need a subset of the rows where the minutes are 53. The hour is
> immaterial. I can not find a wildcard character to use to select the rows.
>
> as.character(wtd$dt) %in% "2009-06-21 ??:53:00" or as.character(wtd$dt)
> %in% "2009-06-21 **:53:00" does not work.
>
> What would you recommend?
>
> Thanks,
>
> Keith Jones, Ph.D.
> VTS Pumps
>
> ______________________________________________
> R-help@r-project.org mailing list
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem that you are trying to solve?
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