```
# \donttest{
n <- 1000
set.seed(0)
x <- rnorm(n, mean = -1, sd = 2)
mvnX(x)
mu <- c(-1, 0, 1)
set.seed(0)
x <- sweep(matrix(rnorm(n*3), n, 3) %*% (2*diag(3)),
MARGIN = 2, STATS = mu, FUN = "+")
mvnXII(x)
set.seed(0)
x <- sweep(matrix(rnorm(n*3), n, 3) %*% diag(1:3),
MARGIN = 2, STATS = mu, FUN = "+")
mvnXXI(x)
Sigma <- matrix(c(9,-4,1,-4,9,4,1,4,9), 3, 3)
set.seed(0)
x <- sweep(matrix(rnorm(n*3), n, 3) %*% chol(Sigma),
MARGIN = 2, STATS = mu, FUN = "+")
mvnXXX(x)
# }
```

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