diag() losing dimnames

[Peter Dalgaard BSA]

Martin Maechler <maechler@stat.math.ethz.ch> writes:

> --- ../R-0.62.3/src/library/base/R/diag.R	Fri Mar  6 08:37:13 1998
> +++ diag.R	Wed Sep  9 17:58:11 1998
> @@ -2,7 +2,7 @@
>  function(x = 1, nrow, ncol = n)
>  {
>  	if(is.matrix(x) && nargs() == 1)
> -		return(as.matrix(x)[1 + 0:(min(dim(x)) - 1) * (dim(x)[1] + 1)])
> +		return(c(x)[1 + 0:(min(dim(x)) - 1) * (dim(x)[1] + 1)])
>  	if(missing(x))
>  		n <- nrow
>  	else if(length(x) == 1 && missing(nrow) && missing(ncol)) {

That's only half a solution:
> m[1:4]
 1  2 NA NA 
 1  2  3  4 

Splus:

> m<-matrix(1:4,2)
> dimnames(m)<-list(1:2,NULL)
> m
  [,1] [,2] 
1    1    3
2    2    4
> m[1:4]
[1] 1 2 3 4

R
> m<-matrix(1:4,2)
> rownames(m)<-1:2
> m[1:4]
 1  2 NA NA 
 1  2  3  4 

I.e. it seems that it should be fixed in the "[" internals.

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