Hi,

So let's say I have a function `f`

that returns the min, max, and median of a numerical vector x as a vector of 3 values.

```
f <- function(x) {
c( min(x), max(x), median(x) )
}
```

Is there a way to use `f`

in a `dplyr::summarise`

call to get these 3 statistics as independent variables as one would get using the following "full" call?

```
require(tidyverse)
set.seed(12345)
df <- data.frame(
x = rnorm(1000),
y = sample(1:2, 1000, replace = TRUE)
)
df %>%
group_by(y) %>%
summarise(
min = min(x),
max = max(x),
median = median(x)
)
```