[Rd] is.matrix

[Peter Dalgaard]

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?
> 
> Hadley
> 

Yes, I suspect a typo there.

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