[R] How to personalize the rpart function: t.default(x)

Simone Vantini vantini at mate.polimi.it
Mon Sep 6 20:20:57 CEST 2004

>Thanks a lot!I've found that the matrix argument of the function
>t.default() is init$y. I thought that y and x were the response and the
>predective variables of the data of the node, isn't it?
On top of what Rolf had said, traceback() would help tracking down how
> the error happened.
> Andy
>> From: Rolf Turner
>> t is for transpose; look at ?t, ?t.default,
>> ?t.data.frame
>> Bottom line:  Somewhere in your code you are trying to transpose
>> something that is not a matrix.  (Or you are passing to an existing
>> function an object which that function expects to be a matrix, but
>> isn't.)
>> 			cheers,
>> 				Rolf Turner
>> 				rolf at math.unb.ca
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