This is deliberate, to avoid excessively long computations in
validate_tm in src/main/datetime.c. You could increase the limits in
if(tm->tm_mday < -1000 || tm->tm_mday > 1000) return -1;
On Tue, 30 Dec 2003 deville.yves@wanadoo.fr wrote:
> Full_Name: Yves DEVILLE
> Version: 1.7.1
> OS: linux-gnu
> Submission from: (NULL) (213.203.71.194)
>
>
> There seems to be a problem with seq.POSIXt with by="DSTday" and
length>=999. In
> the result,
> NA are produced for indexes >=999 (no such problem with
by="day" or "x days")
>
> Begins <- as.POSIXct(strptime("1995-09-03",
format="%Y-%m-%d"))
>
> ## Works (whatever be Begins)
> Length <- 998
> Ends <- seq(from=Begins, length=Length, by="DSTday")[Length]
>
> ## returns NA in Ends (whatever be Begins)
> Length <- 999
> Ends <- seq(from=Begins, length=Length, by="DSTday")[Length]
>
> ## Works
> Length <- 499
> Ends <- seq(from=Begins, length=Length, by="2
DSTdays")[Length]
>
> ## Returns NA
> Length <- 500
> Ends <- seq(from=Begins, length=Length, by="2
DSTdays")[Length]
>
> Best regards,
>
> Yves Deville
>
> R.version
>
> platform i686-pc-linux-gnu
> arch i686
> os linux-gnu
> system i686, linux-gnu
> status
> major 1
> minor 7.1
> year 2003
> month 06
> day 16
> language R
>
> ______________________________________________
> R-devel@stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
>
>
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595