Nothing
test_that("Polar2Rec works", {
expect_equal(Polar2Rec(2,pi/4), list(X=c(sqrt(2),sqrt(2)),V=c(sqrt(2),sqrt(2))/2))
})
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.