R: Adds tolerance ellipses to a ternary diagram.

ternaryDiagEllipse {robCompositions} | R Documentation

## Adds tolerance ellipses to a ternary diagram.

### Description

Low-level plot function which add tolerance ellipses to a high-level plot of a ternary diagram.

### Usage

    ternaryDiagEllipse(x, tolerance = c(0.9, 0.95, 0.975), locscatt = "MCD", ...)

### Arguments

`x` | Three-part composition. Object of class “matrix” or “data.frame”.
`tolerance` | Determines the amount of observations with Mahalanobis distance larger than the drawn ellipse, scaled to one.
`locscatt` | Method for estimating the mean and covariance.
`...` | Additional arguments passed trough.

### Value

no values are returned.

### Author(s)

Peter Filzmoser, Matthias Templ

### See Also

`ternaryDiag`

### Examples

    data(coffee)
    x <- coffee[,2:4]
    ternaryDiag(x, grid=FALSE)
    ternaryDiagEllipse(x)
    ## or directly:
    ternaryDiag(x, grid=FALSE, line="ellipse")

[Package robCompositions version 2.3.1 Index]