tlumley at u.washington.edu
2008-Aug-13 15:25 UTC
[Rd] Column name disappears when indexing a single column (PR#12534)
1. This is not a bug (as you seem to realize), so it should not be sent to
r-bugs.
2. You seem to want the drop=FALSE argument to [], as in FAQ 7.5
-thomas
On Wed, 13 Aug 2008 cherrera at cs.nmsu.edu wrote:
> Good Day,
> I can understand that after indexing a single column in a matrix, R will
return a vector instead of the single column. However, during the conversion to
a vector, the column name is lost.
> I was wondering if it would be better to have R return a single column
matrix (retaining the column name), instead of automatically converting to a
vector. Users could use as.vector() to convert afterwards.
>
> Thanks,
> CMHJ
> <<insert bug report here>>
>
>
>
> --please do not edit the information below--
>
> Version:
> platform = x86_64-unknown-linux-gnu
> arch = x86_64
> os = linux-gnu
> system = x86_64, linux-gnu
> status > major = 2
> minor = 7.1
> year = 2008
> month = 06
> day = 23
> svn rev = 45970
> language = R
> version.string = R version 2.7.1 (2008-06-23)
>
> Locale:
>
LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICATION=C
>
> Search Path:
> .GlobalEnv, package:stats, package:graphics, package:grDevices,
package:utils, package:datasets, package:methods, Autoloads, package:base
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
Thomas Lumley Assoc. Professor, Biostatistics
tlumley at u.washington.edu University of Washington, Seattle