Hi, I am learning decisions trees using R ..I used RPART to create decision maps. when i saw the summary .. i got CP nsplit rel error xerror xstd Could anyone make me understand terms here CP,relerror xerror and xstand. or could you please provide the detailed blog where i can learn,, Thanks, Santosh -- View this message in context: http://r.789695.n4.nabble.com/need-explaination-on-Rpart-tp4534612p4534612.html Sent from the R help mailing list archive at Nabble.com.