timeDate
In which case, be aware that R's round() function rounds to the nearest even number when the fraction is 0.5:
round(c(1.5,2.5))
[1] 2 2 which might not be desirable for times. Consider floor() or trunc() instead.
floor(c(1.5,2.5))
[1] 1 2
trunc(c(1.5,2.5))
[1] 1 2
At 9:48 PM +0000 11/22/04, Gabor Grothendieck wrote:
Yasser El-Zein <abu3ammar <at> gmail.com> writes:
>From the document it is apparent to me that I need as.POSIXct (I have
a double representing the number of millis since 1/1/1970 and I need to construct a datetime object). I see it showing how to construct the time object from a string representing the time but now fro a double of millis. Does anyone know hoe to do that?
If by millis you mean milliseconds (i.e. one thousandths of a second)
then POSIXct does not support that resolution, but if rounding to
seconds is ok then
structure(round(x/1000), class = c("POSIXt", "POSIXct"))
should give it to you assuming x is the number of milliseconds.
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-------------------------------------- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA