Re: [R] converting from numeric to Date
> Limite_x<-c(1131408000,1163548800)
> structure(Limite_x, class=c("POSIXt","POSIXct"))
[1] "2005-11-07 19:00:00 Eastern Standard Time" "2006-11-14 19:00:00
Eastern Standard Time"
>
On 11/23/06, COMTE Guillaume <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I have a Date, that has been converted to a number that represent the
> count of seconds since year 1970, how do i convert it to a date ?
>
>
>
> Example :
>
>
>
> >Limite_x<-c(1131408000,1163548800)
>
> >is(limite_x)
>
> [1] "numeric" "vector"
>
>
>
> But these numbers are dates, did R provide something that give you the
> date from this numeric vector ?
>
>
>
> Thks all.
>
>
>
> COMTE Guillaume.
>
>
>[[alternative HTML version deleted]]
>
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Jim Holtman
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+1 513 646 9390
What is the problem you are trying to solve?
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Re: [R] converting from numeric to Date
"COMTE Guillaume" <[EMAIL PROTECTED]> writes:
> Hi all,
>
> I have a Date, that has been converted to a number that represent the
> count of seconds since year 1970, how do i convert it to a date ?
> Example :
> >Limite_x<-c(1131408000,1163548800)
>
> >is(limite_x)
>
> [1] "numeric" "vector"
Not really:
> is(limite_x)
Error in .class1(object) : object "limite_x" not found
(Point being that you should be careful when citing R output that it
really is feasible output.)
> But these numbers are dates, did R provide something that give you the
> date from this numeric vector ?
Just add the origin:
> Limite_x + ISOdatetime(1970,1,1,0,0,0)
[1] "2005-11-08 CET" "2006-11-15 CET"
or (watch it!)
> Limite_x/24/3600 + as.Date("1970-1-1")
[1] "2005-11-08" "2006-11-15"
--
O__ Peter Dalgaard Øster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
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