[R] Re transaction list transformation to use rpart.

From: Terry Therneau <therneau_at_mayo.edu>
Date: Mon, 07 Mar 2011 08:35:03 -0600


> However the as.data.frame(a) transforms the matrix into a numeric
> data.frame so when I implement the rpart algorithm it automatically
> returns a regression classification tree.

  Look at help(rpart). The program uses the type of the y variable to GUESS at what you want for the "method" argument. It often guesses wrong. Simply add

   method="class"
as an argument to your call.

Terry Therneau



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