[R] names(dist(mat)) gives NULL in R 2.1.0

[Liaw, Andy]

> From: Elio Mineo
> 
> Thanks, Peter.
> So, in R 2.1.0 there is no way to get names from a "dist" 
> object, isn't 
> there?

If you are referring to the row names of the matrix from which distances are
computed, see the "Value" section of ?dist, which has:

The object has the following attributes (besides "class" equal to "dist"): 

Size   integer, the number of observations in the dataset. 
Labels optionally, contains the labels, if any, of the observations of the
dataset. 
[...]

Andy
 
 
> Peter Dalgaard wrote:
> 
> >Elio Mineo <elio_mineo at economia.unipa.it> writes:
> >
> >  
> >
> >>In R 2.1.0 I have:
> >>
> >>    
> >>
> >>>names(dist(mat))
> >>>      
> >>>
> >>NULL
> >>
> >>I have tried this on Windows (precompiled binary 
> distribution) and on
> >>Linux Mandrake 10.0 (R compiled from source code).
> >>Is this a bug or not?
> >>    
> >>
> >
> >Not.
> >
> >>From the NEWS file:
> >
> >    o   The S3 methods for getting and setting names of 
> "dist" objects
> >        have been removed (as they provided names with a different
> >        length from the "dist" object itself).
> >
> >(some side effects are fixed in 2.1.0-patched)
> >
> >  
> >
> 
> -- 
> --------------------------------------------------------------
> --------------------
> Prof. Angelo M. Mineo
> Dipartimento di Scienze Statistiche e Matematiche "S. Vianelli"
> Università degli Studi di Palermo
> Viale delle Scienze
> 90128 Palermo
> url: http://dssm.unipa.it/elio
> 
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