Problem in Dates
Read R News 4/1 help desk article and the last line of every message to r-help. Also putting POSIXlt objects into data frames is asking for trouble.
On 12/19/06, Shubha Karanth <shubhakaranth at gmail.com> wrote:
Hi Experts,
I have a problem in Dates.
I have a zoo object called 'intra'. And the class of index(intra) is
("Chron" "Dates" "Time"). I need to put the index of this zoo object into a
data frame. So I used,
idat<-data.frame(Datetime=as.POSIXlt(index(intra),"GMT"))
But I get the values of 'idat' to be:
"01joulu2006 09:59:59"
"01joulu2006 10:09:59"
"01joulu2006 10:19:59"
"01joulu2006 10:30:00"
"01joulu2006 10:40:00"
"01joulu2006 10:50:00"
But I need the 'idat' format to be:
2006-12-01 13:30:00
2006-12-01 13:40:00
2006-12-01 13:50:00
2006-12-01 14:00:00
2006-12-01 14:10:00
2006-12-01 14:19:59
2006-12-01 14:29:59
i.e., instead of joulu (The finnish version of December) I need to get in
the number format. How do I do this? Do I need to change the OS date format?
Because I read a documentation which says "Unfortunately, the documentation
of POSIXt objects is Operating system dependent and especially under MS
Windows several problems appear in the management of time zones and day
light saving times" (Source: R Documentation, timeDate Class). Thought this
may help you?
Thank you,
Shubha.
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