Hi Jim

I´m using R 2.11.0, on Windows XP.

On Thu, May 20, 2010 at 4:55 PM, jim holtman <jholtman@gmail.com> wrote:

> Please provide information as to what version you are using;  works fine
> for me:
>
> > time3=strptime("2009 06 01 00 47 00",format="%Y %m %d %H %M")
> > time4=strptime("2009 06 01 00 57 00",format="%Y %m %d %H %M")
> >
> > diff(c(time3,time4))
> Time difference of 10 mins
> >
>
> I have version 2.10.1
>
> On Thu, May 20, 2010 at 12:36 PM, Julian Burgos <jmburgos@uw.edu> wrote:
> > Dear list,
> >
> > I´m calculating time differences between series of time stamps and I
> noticed
> > something odd:
> >
> > If I do this...
> >
> >> time1=strptime("2009 05 31 22 57 00",format="%Y %m %d %H %M")
> >> time2=strptime("2009 05 31 23 07 00",format="%Y %m %d %H %M")
> >>
> >> diff(c(time1,time2),units="mins")
> > Time difference of 10 mins
> >
> > .. I get the correct response in minutes.  But if I try the same thing
> with
> > different values, say..
> >
> >> time3=strptime("2009 06 01 00 47 00",format="%Y %m %d %H %M")
> >> time4=strptime("2009 06 01 00 57 00",format="%Y %m %d %H %M")
> >>
> >> diff(c(time3,time4))
> > Time difference of NA secs
> >
> > ...which is not what I´m looking for. The difference should also be 10
> > minutes.
> >
> > I burned a few neurons (and searched the documentation) and I cannot
> figure
> > why this happens.  Any ideas?
> >
> > All the best,
> >
> > Julian
> >
> > Julian Mariano Burgos
> > Hafrannsóknastofnunin/Marine Research Institute
> > Skúlagata 4, 121 Reykjavík, Iceland
> > Sími/Telephone : +354-5752037
> > Bréfsími/Telefax:  +354-5752001
> > Netfang/Email: julian@hafro.is, jmburgos@uw.edu
> >
> >        [[alternative HTML version deleted]]
> >
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
> >
>
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem that you are trying to solve?
>



-- 
Julian Mariano Burgos
Hafrannsóknastofnunin/Marine Research Institute
Skúlagata 4, 121 Reykjavík, Iceland
Sími/Telephone : +354-5752037
Bréfsími/Telefax:  +354-5752001
Netfang/Email: julian@hafro.is, jmburgos@uw.edu

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