```
x <- runif(30)
y <- runif(30)
w <- convexhull.xy(x,y)
plot(owin(), main="convexhull.xy(x,y)", lty=2)
plot(w, add=TRUE)
points(x,y)
X <- rpoispp(30)
plot(X, main="convexhull.xy(X)")
plot(convexhull.xy(X), add=TRUE)
```

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