Hi all I have a question about "subset" function.> datid 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]]
Hi, Use %in% instead of ==. HTH, Jorge.- On Thu, Jan 12, 2012 at 9:36 PM, 孟欣 <> 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]]
Thanks£¡ ÔÚ 2012-01-13 10:51:14£¬"Jorge I Velez" <jorgeivanvelez@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.> datid 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]]