what is rel error what is the difference between rel error and xerror? difference between rel error and xerror what is the difference between rel error difference between rel error and xerror regression tree what's the difference between xerror and relerror in regression what is the difference between rel error and xerror difference between rel error in regression difference between rel error and xerror what is the difference between rel error and xerror what is rel error in regression difference between rel error and xerror regression what is the difference between rel and xerror in regression what is the difference between rel error and xerror in regression trees rpart rel error what is rel error in regression what is rel error what is the difference between rel error and xerror in regression tests what is the difference between rel error / xerror regression trees difference between rel error and xerror regression trees