[R] Hat Matrix

[hyak]

Hi, I'm a new user of R - Is this how you construct a hat matrix?

H <- x %*% solve(t(x) %*% x) %*% t(x)
H
colnames(H) = rep('', 11)
round(H,2)

If so can you make them for more than 2 matrices?  Why do you have to use
the 2nd piece of code to round and stuff? Shouldn't it be correct from the
start? 

Thanks for any feedback,

Hyak

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