R help - Mar 2001 - convert date/time to numeric

Hi,

I convert a numeric value to date/time format and do
some operations on it. How to convert it back to a
numeric value?

Thanks,
Yu-Ling Wu

=================================================begin <- 200103131030     
EndTime <- strptime(paste(begin), format="%Y%m%d%H%M")
+ 60 
end <- ???? 

(I want end=200103131031 instead of "2001-03-13
10:31:00")
=================================================


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On Wed, 21 Mar 2001, Yu-Ling Wu wrote:
> I convert a numeric value to date/time format and do
> some operations on it. How to convert it back to a
> numeric value?
That's not numeric, that is character when you convert it.  Use the help
system to find how: it's on the same help page as strptime!
> begin <- 200103131030
> EndTime <- strptime(paste(begin), format="%Y%m%d%H%M")
> + 60
> end <- ????
>
> (I want end=200103131031 instead of "2001-03-13
> 10:31:00")
-- 
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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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