Polygon Drawing

Draws the polygons whose vertices are given in x, y and z.

Usage

ternary_polygon(x, y, z, ...)

# S4 method for class 'numeric,numeric,numeric'
ternary_polygon(x, y, z, ...)

# S4 method for class '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().

Value

ternary_polygon() is called it for its side-effects.

See also

graphics::polygon()

Other geometries: ternary_arrows(), ternary_crosshairs(), ternary_labels(), ternary_lines(), ternary_points(), ternary_segments(), ternary_text()

Author

N. Frerebeau

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")