Computes and draws the convex hull of the set of points specified.

## Usage

```
ternary_hull(x, y, z, ...)
# S4 method for numeric,numeric,numeric
ternary_hull(x, y, z, ...)
# S4 method for ANY,missing,missing
ternary_hull(x, y, z, ...)
```

## Arguments

- x, y, z
A

`numeric`

vector giving the x, y and z ternary coordinates of a set of points. If`y`

and`z`

are missing, an attempt is made to interpret`x`

in a suitable way (see`grDevices::xyz.coords()`

).- ...
Further arguments to be passed to

`graphics::polygon()`

.

## See also

`grDevices::chull()`

, `graphics::polygon()`

Other statistics:
`ternary_contour()`

,
`ternary_density()`

,
`ternary_ellipse()`

,
`ternary_mean()`

,
`ternary_pca()`

## Examples

```
## Convex hull
## Data from Aitchison 1986
ternary_plot(lava, panel.first = ternary_grid(5, 10))
ternary_hull(lava, border = "red")
```