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
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