[R] sort dates

Petr PIKAL petr.pikal at precheza.cz
Fri Mar 9 14:51:15 CET 2012


Hi

> 
> Hello,
> How is it possible to sort dates in R?

You mean sort? Or order? Something like:

> dd <-sample(Sys.Date()-1:10)
> dd
 [1] "2012-03-04" "2012-03-05" "2012-02-29" "2012-03-01" "2012-03-02"
 [6] "2012-03-08" "2012-03-03" "2012-02-28" "2012-03-06" "2012-03-07"
> sort(dd)
 [1] "2012-02-28" "2012-02-29" "2012-03-01" "2012-03-02" "2012-03-03"
 [6] "2012-03-04" "2012-03-05" "2012-03-06" "2012-03-07" "2012-03-08"
> dd[order(dd)]
 [1] "2012-02-28" "2012-02-29" "2012-03-01" "2012-03-02" "2012-03-03"
 [6] "2012-03-04" "2012-03-05" "2012-03-06" "2012-03-07" "2012-03-08"
>

Regards
Petr

> 
> Cheers,
> 
> Carol
> 
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