Nothing
test_that("fabs", {
expect_identical(fabs(numeric(0)), numeric(0))
expect_identical(fabs(NA), NA_integer_)
expect_identical(fabs(-1), 1)
expect_identical(fabs(c(-1.3, 2.777)), c(1.3, 2.777))
expect_identical(fabs(-1:2), c(1L, 0L, 1L, 2L))
})
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.