[R] round Date object to 10 minutes intervals?

[kmay]

Dear Mr. Ripley,

your answer perfectly fits my needs, thank you very much.
(And yes, rounding 5 to even is what I wanted).


Prof Brian Ripley wrote
> 
> t2 <- strptime(timeStamp, format="%d.%m.%Y %H:%M")
> t2$min <- round(t2$min, -1)
>> format(t2, "%d.%m.%Y %H:%M")
> [1] "31.03.2011 09:30" "31.03.2011 09:40" "31.03.2011 10:00" "31.03.2011
> 10:10"
> [5] "31.03.2011 10:30" "31.03.2011 10:40" "31.03.2011 10:50" "01.04.2011
> 00:00"
> 


Prof Brian Ripley wrote
>  
> t2$min <- 10*floor((t2$min + 5)/10)
> t2$min <- 10*floor((t2$min + 4)/10)
> 
This really got me thinking and as a result increased my understanding of
maths & R ,
a big thanks to you  



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