Nothing

```
ex1data <- function(n.data, p=50)
{
x <- runif(n.data*p)
x <- matrix(x, ncol=p)
p1 <- (0.97 * exp(-3*x[,1]))
p3 <- exp(-2.5 * (x[,1]-1.2)^2)
p2 <- (1- p1 - p3)
# class.prob is a matrix of probabilities.
# each column contains the probability that y is in each class for fixed x
class.prob <- cbind(p1, p2, p3)
u <- runif(n.data)
y <- rep(0, n.data)
y[u <= p1] <- 1
y[u > p1 & u < (p1 + p2)] <- 2
y[u >= (p1 + p2)] <- 3
x <- as.data.frame(x)
colnames(x) <- paste("x", 1:ncol(x), sep = "")
return(list(x=x,y=y,p=class.prob))
}
```

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