----- Original Message -----
From: Ista Zahn <istaz...@gmail.com>
To: Fg Nu <fgn...@yahoo.com>
Cc: "r-devel@r-project.org" <r-devel@r-project.org>
Sent: Tuesday, July 23, 2013 9:50 PM
Subject: Re: [Rd] cbind error with check.names
On Tue, Jul 23, 2013 at 9:18 AM, Fg Nu <fgn...@yahoo.com> wrote:
>
>
>
> Here is an example where cbind fails with an error when check.names=TRUE is
> set.
>
> data(airquality)
> airQualityBind =cbind(airquality,airquality,check.names =TRUE)
>
>
> I understand that cbind is a call to data.frame and the following works:
> airQualityBind =data.frame(airquality,airquality,check.names =TRUE)
> but I would like to understand why cbind throws an error.
>
> I asked this question on SO here:
> http://stackoverflow.com/questions/17810470/cbind-error-with-check-names
> and user Hong Ooi confirmed my suspicion that cbind was passing check.names =
> FALSE regardless of my setting that option, even though the help file
> indicates that this should be possible,
>
> "For the "data.frame" method of cbind these can be further arguments to
> data.frame such as stringsAsFactors."
>
> Is there some design principle that I am missing here?
Well, the function does work as documented. See the help file section
on "Data frame methods", which says "The 'cbind' data frame method is
just a wrapper for 'data.frame(..., check.names = FALSE)'".
Best,
Ista
Is there then a reason that overriding the check.names default is forbidden
from cbind? I can't tell why this would be the case.
Thanks
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
