confregion: It computes the confidence region in the ternary space

In plot3logit: Ternary Plots for Trinomial Regression Models

It computes the confidence region in the ternary space

Description

Given the parameters of the confidence ellipse in the space of covariate coefficiets, it returns the confidence region of the effect.

Usage

confregion(mu, Sig, conf = 0.95, npoints = 100)

Arguments

mu	centre of the ellipse.
Sig	covariance matrix of the ellipse.
conf	confidence level of the region.
npoints	number of points of the border.

Value

data.frame with three columns (named p1, p2, and p3) with ternary coordinates of the points of the ellipse.

Examples

Ternary::TernaryPlot()
Ternary::TernaryPolygon(
  coordinates = plot3logit:::confregion(1:2, 0.3 * diag(2:1)),
  col = grDevices::rgb(0, 0, 0.5, 0.2),
  border = NA
)
Ternary::TernaryPolygon(
  coordinates = plot3logit:::confregion(1:2, 0.1 * diag(2:1)),
  col = grDevices::rgb(0, 0, 0.5, 0.2),
  border = NA
)

plot3logit documentation built on July 19, 2022, 9:07 a.m.