| To: | s-news@lists.biostat.wustl.edu |
|---|---|
| Subject: | interpretation of xerror in rpart |
| From: | michael westphal <mi_westphal@yahoo.com> |
| Date: | Fri, 17 Mar 2006 12:09:07 -0800 (PST) |
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Hello: I am using the rpart library in S-Plus 4.5. I see that the correct interpretation for the Relative Error is 1- R^2. What exactly is the interpretation of xerror, the cross-validation error? It is related to the model's predictive ability, but numerically what does it mean? Is it possible for the xerror to be greater than 1.0? Thank you. Cheers, Michael
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