[R] Getting the numeric value of difftime

[Dimitris Rizopoulos]

just try

as.numeric(difftime(date1, date2))


Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://www.med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "Christian Neumann" <christian.neumann at ai.wu-wien.ac.at>
To: <r-help at stat.math.ethz.ch>
Sent: Friday, January 13, 2006 2:05 PM
Subject: [R] Getting the numeric value of difftime


> Hi folks,
>
> I have a small, maybe newbie, question concerning date operations.
> The follwing snippet
>
> date1 = "2005-11-20";
> date2 = "2005-11-17";
> difftime(date1, date2)
>
> results in "Time difference of 3 days". How can I extract just the
> numerical value 3?
> As a workaround I apply mean() on the result which gives me just a
> numerical value.
>
> Thanks a lot,
>
> Christian
>
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