Nothing

```
context("Group sizes")
test_that("ungrouped data has 1 group, with group size = nrow()", {
df <- tibble(x = rep(1:3, each = 10), y = rep(1:6, each = 5))
expect_equal(n_groups(df), 1L)
expect_equal(group_size(df), 30)
})
test_that("rowwise data has one group for each group", {
rw <- rowwise(mtcars)
expect_equal(n_groups(rw), 32)
expect_equal(group_size(rw), rep(1, 32))
})
test_that("group_size correct for grouped data", {
df <- tibble(x = rep(1:3, each = 10), y = rep(1:6, each = 5)) %>% group_by(x)
expect_equal(n_groups(df), 3L)
expect_equal(group_size(df), rep(10, 3))
})
```

**Any scripts or data that you put into this service are public.**

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.