[Rd] Underlying representation for rownames
Prof Brian Ripley
ripley at stats.ox.ac.uk
Thu Oct 18 19:36:33 CEST 2007
I think ?.row_names_info is what you are looking for (although data frames
have row.names and matrices have rownames, pace the subject line).
On Thu, 18 Oct 2007, hadley wickham wrote:
> Is it possible to get at the underlying representation of row names -
> ie. what you see in the output from dput:
>
>> df <- data.frame(1:4)
>> dput(df)
> structure(list(X1.4 = 1:4), .Names = "X1.4", row.names = c(NA,
> -4L), class = "data.frame")
>
> I would like to be able to tell if a data frame has the default row
> names, or if they have been changed by the user. I need this for
> rggobi because in GGobi row names should be unique across all data
> frames, unless explicitly set by the user.
>
> Thanks,
>
> Hadley
>
>
>
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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