Just to follow up on Robert's comment, If you do an ls() you'll see that you've created objects V1, V2 in your global environment.
A very similar question was discussed last week (I think... it's all a blur) in the context of using "<-" instead of "=" with named function arguments. Michael On 13 December 2010 14:10, robert denham <rjaden...@gmail.com> wrote: > On Mon, Dec 13, 2010 at 1:09 PM, robert denham <rjaden...@gmail.com> wrote: > >> in >> test <- data.frame(V1=c(1,2,3), V2=c(4,5,6)) >> >> you are using arguments to the data.frame function in the tag=value format. >> From the help: >> >> ...: these arguments are of either the form ‘value’ or ‘tag = >> value’. Component names are created based on the tag (if >> present) or the deparsed argument itself. >> >> in >> test <- data.frame(V1<-c(1,2,3), V2<-c(4,5,6)) >> you are using the value part, with the values being c(1,2,3) and c(4,5,6). >> Someone might explain whats really going on, but I don't think the >> assignment >> of c(1,2,3) to the variable V1 is done before the data.frame is evaluated. >> >> >> >> >> >> On Mon, Dec 13, 2010 at 12:53 PM, Matt Cooper <mattcst...@gmail.com>wrote: >> >>> Pure curiosity but does anyone know why '<-' and '=' generate different >>> columning headers? >>> >>> > test <- data.frame(V1=c(1,2,3), V2=c(4,5,6)) >>> > test >>> V1 V2 >>> 1 1 4 >>> 2 2 5 >>> 3 3 6 >>> >>> > test <- data.frame(V1<-c(1,2,3), V2<-c(4,5,6)) >>> > test >>> V1....c.1..2..3. V2....c.4..5..6. >>> 1 1 4 >>> 2 2 5 >>> 3 3 6 >>> >>> > names(test) >>> [1] "V1....c.1..2..3." "V2....c.4..5..6." >>> >>> [[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. > > ______________________________________________ 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.
