[R] Data.frame query

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Mon Jun 26 13:27:59 CEST 2000

r.e.darnell at ncl.ac.uk (R.E. Darnell) writes:

> I think I have a data.frame called "statlab".
>  > is.data.frame(statlab)
> [1] TRUE
> and I can perform summary, dim, ...
> but when I try
>  > attach(statlab)
> Error in attach(statlab) : attach only works for lists and data frames
> This has got to be embarrassingly simple.
> Any one like to point out my error?

Well, it's not simple to point out from the clues given. Your R
version is a tad old, but I wouldn't expect that to be the problem.
The best guess is that statlab is not really a dataframe, but
something else with a "data.frame" class attached to it. Looking at
the output of str(statlab) could be informative.

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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