[R-SIG-Finance] ISO-8601 with time zone designator, format handling with fCalendar/chron

[Gabor Grothendieck]

Here is one improvement.  The sgn line is changed to make the entire
calculation vectorized:

library(chron)
x <- "2005-12-05T00:00:00+02:00"
x <- c(x, x)
datetime <- chron(as.Date(x), substring(x, 12, 19))
sgn <- substring(x, 20, 20)
sgn <- (sgn == "+") - (sgn == "-")
offset <- as.numeric(times(paste(substring(x, 21), "00", sep = ":")))
# or should + be - in next line?
datetime + sgn * offset


On 5/31/07, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> Try this:
>
> library(chron)
> x <- "2005-12-05T00:00:00+02:00"
> datetime <- chron(as.Date(x), substring(x, 12, 19))
> sgn <- switch(substring(x, 20, 20), "+" = +1, "-" = -1)
> offset <- as.numeric(times(paste(substring(x, 21), "00", sep = ":")))
> datetime + sgn * offset
>
> # or perhaps the last line should be:
> datetime - sgn * offset
>
> On 5/31/07, jeam <eraslan.cem at gmail.com> wrote:
> >
> > Dear All;
> >
> > I have searched the forum but couldn't find a similar problem.
> > Currently I am working with a very large set of XML files and the date is
> > formatted something like that
> > (YYYY-MM-DDThh:mm:ss+TZD)
> >
> > Ex: "2005-12-05T00:00:00+02:00"
> >
> > Previously, I've tried chron and fCalendar but couldn't find a way to import
> > this data as a time object.
> >
> > I think somehow, timeDate may handle it, i tried almost all variations
> > formats, but couldn't make it work.
> >
> > Any help appreciated...
> >
> > Regards
> >
> > --
> > View this message in context: http://www.nabble.com/ISO-8601-with-time-zone-designator%2C-format-handling-with-fCalendar-chron-tf3849304.html#a10903450
> > Sent from the Rmetrics mailing list archive at Nabble.com.
> >
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