[R] Dates in Windows

[Prof Brian Ripley]

%s is of course not documented on ?strftime: it is a glibc extension and 
marked as such on my Linux man page.

But as.numeric(x) gives you the number of days, and
as.numeric(as.POSIXct(x)) gives you the number of seconds, equal to
86400*as.numeric(x).

[Why are you including empty commands at the end of every R line?
It is not necessary and makes the code harder to read.]


On Thu, 14 Jun 2007, Tom McCallum wrote:

> Hi everyone,
>
> When using R on Linux I can do the following:
>
>> x <- as.Date("01/04/2007", "%d/%m/%Y");
>> x
> [1] "2007-04-01"
>> print(format(x, "%s"));
> [1] "1175385600"
>
> When using R in Windows XP though the format "%s" does nothing but return
> a blank string.  How can I convert a date to the number of seconds since
> 1970 in Windows?
>
> Cheers
>
> Tom
>
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-- 
Brian D. Ripley,                  ripley at 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