[Rd] is.matrix
hadley wickham
h.wickham at gmail.com
Tue Nov 11 20:48:00 CET 2008
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
--
http://had.co.nz/
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