Thanks£¡
ÔÚ 2012-01-13 10:51:14£¬"Jorge I Velez" <jorgeivanve...@gmail.com> дµÀ£º
Hi,
Use %in% instead of ==.
HTH,
Jorge.-
On Thu, Jan 12, 2012 at 9:36 PM, ÃÏÐÀ <> wrote:
Hi all
I have a question about "subset" function.
> dat
id x1 x2 x3
1 a 1 11 111
2 b 2 22 222
3 c 3 33 333
4 d 4 44 444
> subset(dat,id==c("a","c"))
id x1 x2 x3
1 a 1 11 111
> subset(dat,id==c("a","d"))
id x1 x2 x3
1 a 1 11 111
4 d 4 44 444
>From the above, if I choose id=a,c, the result is wrong,but if I choose
>id=a,d, the result is right.
What's the reason for it?
Many thanks!
My best
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
