On Jan 29, 2011, at 7:45 PM, Simon Goodman wrote:
How can I extract only the time component from an POSIXlt object?
For example if I try the following it still returns both the date and
time...
as.POSIXlt(tr.date[1])
[1] "2010-10-18 21:46:53"
as.POSIXlt(tr.date[1],"%H:%M:%S")
[1] "2010-10-18 21:46:53"
round and trunc don't help... is there an "as.Time" equivalent to
as.Date
?
> ptime <- as.POSIXlt("2010-10-18 21:46:53")
> ptime
[1] "2010-10-18 21:46:53"
> format(ptime, format="%H:%M:%S")
[1] "21:46:53"
This is a character value, no longer a time.
--
David Winsemius, MD
West Hartford, CT
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