```
# NOT RUN {
n <- 100
set.seed(1)
x1 <- runif(n)
x2 <- runif(n)
x3 <- runif(n)
y <- 1*(x1+x2+rnorm(n) > 1)
table(y)
require(rpart)
f <- rpart(y ~ x1 + x2 + x3, model=TRUE)
v <- validate(f)
v # note the poor validation
par(mfrow=c(1,2))
plot(v, legendloc=c(.2,.5))
par(mfrow=c(1,1))
# }
```

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