[R] computing misclassification table for tree objects

[David Marimont]

I have a classification tree that I computed via the tree function
(in the tree package).  I'd like to compute a misclassification table
(if that's the right term) on the data used to compute the tree.  That
is, I want to compute a table with the different classes (i.e.,levels of the
response factor) on the rows and the columns, and where entry [i,j] is
the number of times the tree classified an observation of class i as
one of class j.

My guess is that there's a simple way to do this, but I can't figure out
how.  Does anybody know?  Thanks.

   David Marimont

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