[R] rpart question re NAs introduced by coercion

[Peter Flom]

Hello

running R1.8.0 on Windows

I am running a tree model using rpart, and I get a warning 

NAs introduced by coercion

even though when I examine the variables in the tree, none of them have
any missing vaues.......

What am I missing?

TIA, as always





Peter L. Flom, PhD
Assistant Director, Statistics and Data Analysis Core
Center for Drug Use and HIV Research
National Development and Research Institutes
71 W. 23rd St
www.peterflom.com
New York, NY 10010
(212) 845-4485 (voice)
(917) 438-0894 (fax)