[R] How to stack the columns of matrix
Roger.Bivand at nhh.no
Wed Jun 12 15:55:58 CEST 2002
On Wed, 12 Jun 2002, Dr. Peter Schlattmann wrote:
> Dear all,
> I need to stack the columns of a matrix with a variable number of columns.
> I am aware of
> if I have a matrix 'a' with e.g. two columns. For a simulation study I
> need to stack
> the matrix with a variable number of columns. Is there a way to do this?
aa <- matrix(1:25, nrow=5)
as.vector() seems to stack as you require by column.
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