On 4/10/07, Tony Plate <[EMAIL PROTECTED]> wrote: > Aren't you just seeing the effect of drop=TRUE? (at least with the > examples you give below -- they all pick out a submatrix with extent one > on some dimension) > > AFAICT, matrices with a list as the underlying data work properly, e.g.: > > > vv <- array(as.list(1:12), 3:4) > > vv > [,1] [,2] [,3] [,4] > [1,] 1 4 7 10 > [2,] 2 5 8 11 > [3,] 3 6 9 12 > > vv[1:2,] > [,1] [,2] [,3] [,4] > [1,] 1 4 7 10 > [2,] 2 5 8 11 > > vv[1,,drop=FALSE] > [,1] [,2] [,3] [,4] > [1,] 1 4 7 10 > > > > It can actually be useful sometimes to have a matrix (or array) of > non-atomic objects -- wouldn't your proposed change remove (or at least > damage) that functionality?
I use this functionality a lot in the reshape package. I would hate to see it go! It would be nice to have some way to remove the [[1]] from vv[1, 2][[1]] though. Hadley ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
