Nothing
Rten2 <-
function(X1,X2) {
one.1 <- matrix(1.0, nrow = 1, ncol = ncol(X1))
one.2 <- matrix(1.0, nrow = 1, ncol = ncol(X2))
res <- kronecker(X1,one.2)*kronecker(one.1, X2)
res
}
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