Draws the polygons whose vertices are given in `x`

, `y`

and `z`

.

## Usage

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

Other geometries:
`ternary_arrows()`

,
`ternary_crosshairs()`

,
`ternary_lines()`

,
`ternary_points()`

,
`ternary_segments()`

,
`ternary_text()`

## Examples

```
## Compositional data
coda <- data.frame(
X = c(20, 60, 20),
Y = c(20, 20, 60),
Z = c(60, 20, 20)
)
## Add a polygon
ternary_plot(NULL, panel.first = ternary_grid())
ternary_polygon(coda, density = 5, border = "red")
```