is.matrix
On Tue, Nov 11, 2008 at 1:42 PM, Wacek Kusnierczyk
<Waclaw.Marcin.Kusnierczyk at idi.ntnu.no> wrote:
hadley wickham wrote:
| is.matrix| returns |TRUE| if |x| is a matrix and has a |dim <dim.html>| attribute of length 2) and |FALSE| otherwise
That's confusing! In what situations is x a matrix but does not have a dim attribute?
x = matrix(1,1,1) dim(x) = c(1,1,1)
I think you meant dim(x) <- c(3, 1) You created a 1 x 1 x 1 array. Hadley