pliman (version 2.1.0)

ellipse: Confidence ellipse

Description

Produces a confidence ellipse that is an iso-contour of the Gaussian distribution, allowing to visualize a 2D confidence interval.

Usage

ellipse(
  x,
  conf = 0.95,
  np = 100,
  plot = TRUE,
  fill = "green",
  alpha = 0.3,
  random_fill = TRUE
)

Value

A matrix with coordinates of points sampled on the ellipse.

Arguments

x

A matrix, a data.frame or a list of perimeter coordinates, often produced with object_contour().

conf

The confidence level. Defaults to 0.95

np

Number of sampled points on the ellipse.

plot

Create a plot? Defaults to TRUE.

fill

The color to fill the ellipse. Defaults to "green".

alpha

The alpha value to define the opacity of ellipse. Defaults to 0.3

random_fill

Fill multiple ellipses with random colors? Defaults to TRUE.

References

Claude, J. (2008) Morphometrics with R, Use R! series, Springer 316 pp.

Examples

library(pliman)
ellipse(contours)