add.ellipse {netresponse} | R Documentation

## Add ellipse to an existing plot

### Description

Calculates and plots ellipse corresponding to specified confidence interval in 2-dimensional plot

### Usage

    add.ellipse(centroid, covmat, confidence = 0.95, npoints = 100, col =
    "black", ...)

### Arguments

`centroid` | Vector with two elements defining the ellipse centroid.
`covmat` | Covariance matrix for the investigated data. Only diagonal covariances supported.
`confidence` | Confidence level determining the ellipse borders based on the covariance matrix.
`npoints` | Number of plotting points.
`col` | Color.
`...` | Other arguments to be passed.

### Value

Used for plotting side effects.

### Author(s)

Leo Lahti leo.lahti@iki.fi

### Examples

    #add.ellipse(centroid = c(0, 0), covmat = diag(c(1,2)))

[Package netresponse version 1.40.0 Index]