On Thu, 2010-08-26 at 00:06 -0700, clusty wrote: > Hello, > > I'm building a decision tree in R with the rpart package. Modeling is > fine. But when it comes to scoring, I have the following issue: > > factor 'cust_language' has new level(s) OT > > I think this comes from the fact that when learning, the DT doesn't > see all the possible value of the factor variable cust_language. When > scoring, new values comes and I get this error. However, it should not > be a problem to have new values for a factor variable when scoring > with decision tree. > > Any idea on how I should handle the problem? > Thanks.
Wrong list. R-Devel is for discussion pertaining to development of and with R. You need R-Help. G -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
