[R-SIG-Mac] as.Date() does not work with format %B

Milan Bouchet-Valat nalimilan at club.fr
Sat Jun 9 11:17:38 CEST 2012


I currently experience a problem with my package tm.plugin.factiva on
Macs. I need to parse a locale-dependent date string into a proper Date
object. It works fine on Linux and Windows, but on a Mac I've tested,
parsing dates containing the %B format (for full month name) does not

It's very easy to reproduce (here in French, but it's straightforward to
adapt it to your locale):

> # Check that formatting dates works: OK
> strftime("1998-07-09", "%d %B %Y")
[1] "09 juillet 1998"
> # Try to convert the same string to a date: FAIL
> as.Date("9 juillet 1998", format="%d %B %Y")
[1] NA
> as.Date("09 juillet 1998", format="%d %B %Y")
[1] NA

The locale looks good:
> Sys.getlocale()
[1] "fr_FR.UTF-8/fr_FR.UTF-8/fr_FR.UTF-8/C/fr_FR.UTF-8/fr_FR.UTF-8"

And setting LC_TIME manually does not change anything:
> Sys.setlocale("LC_TIME", "fr_FR.UTF-8")
[1] "fr_FR.UTF-8"
> as.Date("9 juillet 1998", "%d %B %Y")
[1] NA

FWIW, I've also tried using strptime() instead of as.Date(), and the
problem is the same.

This is with R 2.15.0 on Mac OS 10.6.8.

> sessionInfo()
R version 2.15.0 (2012-03-30)
Platform: i386-apple-darwin9.8.0/i386 (32-bit)
[1] fr_FR.UTF-8/fr_FR.UTF-8/fr_FR.UTF-8/C/fr_FR.UTF-8/fr_FR.UTF-8
attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

Any clues much appreciated! ;-)

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