Produces a matrix of ternary plots.

## Usage

```
ternary_pairs(x, ...)
# S4 method for matrix
ternary_pairs(x, margin = NULL, ...)
# S4 method for data.frame
ternary_pairs(x, margin = NULL, ...)
```

## Arguments

- x
A

`matrix`

or a`data.frame`

. Columns are converted to`numeric`

in the same way that`data.matrix()`

does.- ...
Further graphical parameters.

- margin
A

`character`

string or an`integer`

giving the index of the column to be used as the third part of the ternary plots. If`NULL`

(the default), marginal compositions will be used (i.e. the geometric mean of the non-selected parts).

## Value

`ternary_pairs()`

is called it for its side-effects: it results in a graphic
being displayed. Invisibly returns `x`

.

## See also

Other graphical elements:
`ternary_axis()`

,
`ternary_box()`

,
`ternary_grid()`

,
`ternary_plot()`

,
`ternary_title()`