[R] Computing time differences

[Stephen Tucker]

Here is one way:

Vector1 <- c("20080621.00","20080623.00")
Vector2 <- c("20080620.00","20080622.00")
do.call(difftime,
        c(apply(cbind(time1=Vector1,time2=Vector2),2,
              function(x) strptime(x,format="%Y%m%d.00")),
          units="hours"))

see ?strptime, ?difftime and
http://cran.r-project.org/doc/Rnews/Rnews_2004-1.pdf



--- vincent.duval at boehringer-ingelheim.com wrote:

> Dear R users, 
> 
> I have a problem computing time differences using R. 
> 
> I have a date that are given using the following format: 20080620.00, where
> the 4 first digits represent the year, the next 2 ones the month and the
> last
> 2 ones the day. I would need to compute time differences between two
> vectors
> of this given format. 
> 
> I tried around trying to change this format into any type of time serie
> without any succes. 
> 
> Could some one provide me with some useful suggestion and/or tip to know
> where to look?
> 
> I am using R-2.4.0 under Windows XP
> 
> Thanks for your help, 
> 
> Vincent
> 
> 
> 	[[alternative HTML version deleted]]
> 
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> and provide commented, minimal, self-contained, reproducible code.
> 



       
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