doc buglet / bug: row / col as.factor requires dimnames

col(matrix(0, 5, 5), as.factor=TRUE) fails

col(matrix(0, 5, 5), as.factor=TRUE)

Error in factor(.Internal(col(dim(x))), labels = colnames(x)) : 
  invalid labels; length 0 should be 1 or 5

when the matrix has no dimnames. This is not as advertised. I would
have expected the equivalent of

factor(.Internal(col(dim(x))),
       labels=colnames(x, do.NULL=FALSE, prefix=""))

sessionInfo()

R version 2.8.0 Under development (unstable) (2008-05-13 r45682) 
x86_64-unknown-linux-gnu 

Martin

Martin Morgan
Computational Biology / Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N.
PO Box 19024 Seattle, WA 98109

Location: Arnold Building M2 B169
Phone: (206) 667-2793