check the help page; there is a parameter ('units' I thnk) that will let you specify that.

Sent from my iPad

On Oct 10, 2011, at 2:57, Alaios <alaios@yahoo.com> wrote:

> Thanks a lot. 
> That helped.
> One thing now is to have the difftime(y,x) to always report seconds. There are times that there is a change in the day and thus the diff will report few days difference. How can it always report only seconds?
> 
> I would like to thank you in advance for your help
> 
> B.R
> Alex
> 
> From: jim holtman <jholtman@gmail.com>
> To: Alaios <alaios@yahoo.com>
> Cc: "R-help@r-project.org" <R-help@r-project.org>
> Sent: Friday, October 7, 2011 5:34 PM
> Subject: Re: [R] Handling Time in R
> 
> ?ISOdatetime
> 
> 
> > x <- ISOdatetime(2011,10,6,16,23,30.539)
> > str(x)
> POSIXct[1:1], format: "2011-10-06 16:23:30"
> > y <- ISOdatetime(2011,10,6,16,23,30.939)
> > difftime(y,x)
> Time difference of 0.3999999 secs
> >
> 
> 
> On Fri, Oct 7, 2011 at 11:04 AM, Alaios <alaios@yahoo.com> wrote:
> > Dear all,
> > I would like to ask your help regarding handling time stamps in R. I think first I need a reference to read about their logic and how I should handle them.
> >
> > For example, this is a struct I have
> >
> >
> > str(MyStruct$TimeStamps)
> >  num [1:100, 1:6] 2011 2011 2011 2011 2011 ...
> >
> > MyStruct$TimeStamps[1,]
> > [1] 2011.000   10.000    6.000   16.000   23.000   30.539
> >
> > the last field contains seconds.milliseconds.
> >
> > How I can for example make calculations with time stamps like see if the
> > MyStruct$TimeStamps[1,]-MyStruct$TimeStamps[2,] differ more than 300millisecond, or 3 days have passed?
> >
> > I would like to thank you in advance for your suggestions
> >
> > B.R
> > Alex
> >
> >        [[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
> Data Munger Guru
> 
> What is the problem that you are trying to solve?
> 
> 

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