month.abb is hard coded English but I don't think its used by the
routines you are interested in anyways. To momentarily set locale
try this:
Sys.setlocale("LC_ALL","EN")
and
Sys.setlocale("LC_ALL","FR")
On 9/7/05, Sebastien Durand <[EMAIL PROTECTED]> wrote:
> Dear all,
>
> I am running
> R : Copyright 2005, The R Foundation for Statistical Computing
> Version 2.1.1 (2005-06-20), ISBN 3-900051-07-0
> Under Mac os X, a french version!
>
> I am preparing a package and I got the following issue
>
> I am trying to read dates that are written in
> english and have them recognized by R using
> as.Date function.
>
> I realized strangely that when I type
> > month.abb
> [1] "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct"
> [11] "Nov" "Dec"
>
> I get the abbreviated english version of every month
>
> > x <- c("1-jan-1960", "2-feb-1960",
> >"31-mar-1960", "30-apr-1960","2-may-1960",
> >"31-jun-1960", "30-jul-1960","2-aug-1960",
> >"31-sep-1960", "30-oct-1960", "30-nov-1960",
> >"30-dec-1960");
> > strptime(x, "%d-%b-%Y")
> [1] "1960-01-01" NA "1960-03-31" NA
> [5] NA NA "1960-07-30" NA
> [9] "1960-10-01" "1960-10-30" "1960-11-30" NA
>
> It is only once I have found through trial an
> error the french abbreviation, that I got a match
> for every month.
>
> > x <- c("1-jan-1960", "2-fév-1960",
> >"31-mar-1960", "30-avr-1960","2-mai-1960",
> >"31-jui-1960", "30-jul-1960","2-aoû-1960",
> >"31-sep-1960", "30-oct-1960", "30-nov-1960",
> >"30-déc-1960");
> > strptime(x, "%d-%b-%Y")
> [1] "1960-01-01" "1960-02-02" "1960-03-31" "1960-04-30"
> [5] "1960-05-02" "1960-07-01" "1960-07-30" "1960-08-02"
> [9] "1960-10-01" "1960-10-30" "1960-11-30" "1960-12-30"
>
> I got simply two questions:
>
> First, why since R was install on a french system
> the month.abb command didn't give me the french
> abbreviations.
>
> Secondly, since I am producing a package, I would
> like to know how can I tell R to momentairly use
> the english abbreviations instead of the french
> ones...
>
> Thanks a lot
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