[R] how is xerror calculated in rpart?

Seth sjmyers at syr.edu
Fri Apr 30 02:53:47 CEST 2010


I've searched online, in a few books, and in the archives, but haven't seen
this.  I believe that xerror is scaled to rel error on the first split. 
After fitting an rpart object, is it possible with a little math to
determine the percentage of true classifications represented by a xerror
value?  -seth
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