[R] Date formats

[Gabor Grothendieck]

Read the warning in ?ifelse

On Dec 30, 2007 1:45 AM, Mikkel Grum <mi2kelgrum at yahoo.com> wrote:
> Is the following expected behaviour for a date used in
> an ifelse function?
>
> > date <- Sys.Date()
> > date
> [1] "2007-12-30"
> > ifelse(TRUE, date-1, date)
> [1] 13876
> > ifelse(FALSE, date-1, date)
> [1] 13877
> > ifelse(TRUE, as.character(date-1), date)
> [1] "2007-12-29"
> > if (TRUE) {date}
> [1] "2007-12-30"
>
> It would seem more natural to me if a date produced
> the same format in an if and an ifelse function.
> Moreover, as far as I can see the ifelse function
> consists of hardly anything but two if functions.
>
> Mikkel
>
> > sessionInfo()
> R version 2.6.1 (2007-11-26)
> i386-pc-mingw32
>
> locale:
> LC_COLLATE=English_Ireland.1252;LC_CTYPE=English_Ireland.1252;LC_MONETARY=English_Ireland.1252;LC_NUMERIC=C;LC_TIME=English_Ireland.1252
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets
> methods   base
>
>
>
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