# conf_ell: Confidence ellipses In Momocs: Morphometrics using R

## Description

Draw (gaussian) confidence ellipses

## Usage

 `1` ```conf_ell(x, y, conf = 0.95, nb.pts = 60) ```

## Arguments

 `x` numeric values on the x axis `y` numeric values on the y axis `conf` the level of confidence `nb.pts` the number of points to return, to draw the ellipsis

## Value

a list with \$ell coordinates of the ellipse and \$seg coordinates of its vertices

a matrix of (x; y) coordinates to draw the ellipsis

## See Also

Other plotting functions: `Ntable`, `coo_arrows`, `coo_draw`, `coo_listpanel`, `coo_lolli`, `coo_plot`, `coo_ruban`, `ldk_chull`, `ldk_confell`, `ldk_contour`, `ldk_labels`, `ldk_links`, `plot_devsegments`

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12``` ```x <- rnorm(100, sd=3) y <- rnorm(100) plot(x, y, asp=1) ce095 <- conf_ell(x, y, conf=0.95) # no need for conf arg since it's .95 by default ce090 <- conf_ell(x, y, conf=0.90) ce050 <- conf_ell(x, y, conf=0.50) cols <- col_hot(10) lines(ce050\$ell, col=cols[5]) # you can also coo_close(ce050\$ell) lines(ce090\$ell, col=cols[8]) lines(ce095\$ell, col=cols[9]) segments(ce095\$seg[1, 1], ce095\$seg[1, 2], ce095\$seg[2, 1], ce095\$seg[2, 2]) segments(ce095\$seg[3, 1], ce095\$seg[3, 2], ce095\$seg[4, 1], ce095\$seg[4, 2]) ```

Momocs documentation built on Sept. 28, 2017, 9:04 a.m.