Hi Ben,
That must be the case! In fact if I do:
> difftime(strptime("24NOV2004", format="%d%b%Y"),
> strptime("13MAY2004",format="%d%b%Y"), units="days", tz="GMT")
Time difference of 195 days
which supports your claim.
Can someone from the R development team confirm this?
Thanks!
...Tao
----- Original Message -----
> From:Ben Bolker <bbol...@gmail.com>
> To:r-h...@stat.math.ethz.ch
> Cc:
> Sent:Friday, October 29, 2010 7:54:53 PM
> Subject:Re: [R] date calculation
>
>
> Shi, Tao <shidaxia <at>
> href="http://yahoo.com";>yahoo.com> writes:
> Could someone
> explain to me why the following result is not a integer?
>
> >
> difftime(strptime("24NOV2004", format="%d%b%Y"), strptime("13MAY2004",
>
> >format="%d%b%Y"), units="days")
> Time difference of 195.0417
> days
Presumably because this goes across a daylight-savings
> time
adjustment? 0.0417=1/24 days is 1 hour ...
Ben
> Bolker
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