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]]
"COMTE Guillaume" <g.comte at alliance-ir.net> 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 ?ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
> 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 <g.comte at alliance-ir.net> 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]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >-- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve?