R help - Jul 2003 - data.frame subsetting

Hi,

is there advice how to subset a data.frame, where until R version 1.7.0 
it was possible to write

 > data[["subset"]]

which meant the same as

 > data$subset

(data is a data.frame). From 1.7.1 on this does not seem to work longer. 
Could there be a bug in downwards compatibility?

sincerely yours

Dirk

Dirk Repsilber wrote:
> Hi,
> 
> is there advice how to subset a data.frame, where until R version 1.7.0 
> it was possible to write
> 
>  > data[["subset"]]
> 
> which meant the same as
> 
>  > data$subset
> 
> (data is a data.frame). From 1.7.1 on this does not seem to work longer. 
> Could there be a bug in downwards compatibility?
> 
> sincerely yours
Works for me. Are you sure the object "data" is a data.frame in your
case?

Uwe Ligges

Still works for me in both 1.7.1 and 1.8.0 (in development)
> data(women)
> women[["height"]]
 [1] 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
> women$height
 [1] 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

Can you provide an example of how it is failing for you?


Dirk Repsilber <dirk.repsilber at gmx.de> writes:
> Hi,
> 
> is there advice how to subset a data.frame, where until R version
> 1.7.0 it was possible to write
> 
> 
>  > data[["subset"]]
> 
> which meant the same as
> 
>  > data$subset
> 
> (data is a data.frame). From 1.7.1 on this does not seem to work
> longer. Could there be a bug in downwards compatibility?
> 
> 
> sincerely yours
> 
> Dirk
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
-- 
Douglas Bates                            bates at stat.wisc.edu
Statistics Department                    608/262-2598
University of Wisconsin - Madison        http://www.stat.wisc.edu/~bates/

On Thu, 24 Jul 2003 16:27:28 +0200, Dirk Repsilber
<dirk.repsilber at gmx.de> wrote :
>Hi,
>
>is there advice how to subset a data.frame, where until R version 1.7.0 
>it was possible to write
>
> > data[["subset"]]
>
>which meant the same as
>
> > data$subset
>
>(data is a data.frame). From 1.7.1 on this does not seem to work longer. 
>Could there be a bug in downwards compatibility?
What are you trying to achieve?  The notation you give still works if
"subset" is one of the column names; I don't think it ever worked
if
"subset" was a logical vector, like its name would suggest.

Duncan Murdoch