It means to interpret the literal as an integer rather than a double.
Michael
On Mar 5, 2012, at 9:41 AM, ikuzar <raz...@hotmail.fr> wrote:
> Hi,
> I'd like to know what "L" means in "1L" in the instruction below:
> for(i in 1:20){ z$mday <- z$mday + 1L ; cat(is.na(z), ": ");print(z)}
>
> The result :
> FALSE : [1] "2009-02-26 06:30:00"
> FALSE : [1] "2009-02-27 06:30:00"
> FALSE : [1] "2009-02-28 06:30:00"
> FALSE : [1] "2009-03-01 06:30:00"
> FALSE : [1] "2009-03-02 06:30:00"
> FALSE : [1] "2009-03-03 06:30:00"
> FALSE : [1] "2009-03-04 06:30:00"
> FALSE : [1] "2009-03-05 06:30:00"
> FALSE : [1] "2009-03-06 06:30:00"
> FALSE : [1] "2009-03-07 06:30:00"
> FALSE : [1] "2009-03-08 06:30:00"
> FALSE : [1] "2009-03-09 06:30:00"
> FALSE : [1] "2009-03-10 06:30:00"
> FALSE : [1] "2009-03-11 06:30:00"
> FALSE : [1] "2009-03-12 06:30:00"
> FALSE : [1] "2009-03-13 06:30:00"
> FALSE : [1] "2009-03-14 06:30:00"
> FALSE : [1] "2009-03-15 06:30:00"
> FALSE : [1] "2009-03-16 06:30:00"
> FALSE : [1] "2009-03-17 06:30:00"
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/strange-behaviour-of-POSIXlt-POSIXt-object-tp4418115p4446305.html
> Sent from the R help mailing list archive at Nabble.com.
>
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