[R] Dates

[ronggui]

this is one way to do it.

> x<-as.Date(c("2005/2/10","2002/2/1"))
> x
[1] "2005-02-10" "2002-02-01"
> ind<-x>as.Date("2005/1/1")
> x[ind]
[1] "2005-02-10"
> x[!ind]
[1] "2002-02-01"


2006/1/8, gynmeerut <gynmeerut at indiatimes.com>:
> Dear All,
>
> I have a dataset containing Date column. I need to breakdown this dataset into two parts one which has datapoints before a particular date and the otherone on or after a particular date.
>
> for example:
> "2005-12-15",
> "2008-12-14",
> "2012-10-01",
> "2009-11-15",
> "2018-10-10",
> "2014-08-31",
> "2016-03-27",
> "2010-01-01".
>   say I want dates before  and after "2009-12-31"
> that means I want ("2005-12-15","2008-12-14","2009-11-15")->x1
> and ("2012-10-01","2018-10-10","2014-08-31","2016-03-27","2010-01-01")->x2
>
>
> I wish to use different programs for these subsets.
> I could not find any way to compare dates with respect to some date.
> Moreover dates are random I vary in no. So above is just an example.
>
>   Any help will be appreciated.
>
> regards,
>
> GS
>
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Deparment of Sociology
Fudan University