plotly_ellipse: Draw Two-Dimensional Ellipse Based on Mean and Covariance...

In mixtools: Tools for Analyzing Finite Mixture Models

Draw Two-Dimensional Ellipse Based on Mean and Covariance using plotly

Description

This is an updated version of ellipse. For more technical details, please refer to ellipse.

Usage

plotly_ellipse(mu, sigma, alpha=.05, npoints=250,
               draw=TRUE, cex = 3, col = "#1f77b4", lwd = 3,
               title = "", title.x = 0.5, title.y = 0.95, title.size = 15,
               xlab = "X", xlab.size = 15, xtick.size = 15,
               ylab = "Y", ylab.size = 15, ytick.size = 15)

Arguments

mu	A 2-vector giving the mean.
sigma	A 2x2 matrix giving the covariance matrix.
alpha	Probability to be excluded from the ellipse. The default value is alpha = .05, which results in a 95% ellipse.
npoints	Number of points comprising the border of the ellipse.
draw	If TRUE, draw the ellipse.
cex	Size of markers.
lwd	Line width of the ellipse.
col	Color of both markers and lines.
title	Text of the main title.
title.size	Size of the main title.
title.x	Horsizontal position of the main title.
title.y	Vertical posotion of the main title.
xlab	Label of X-axis.
xlab.size	Size of the lable of X-axis.
xtick.size	Size of tick lables of X-axis.
ylab	Label of Y-axis.
ylab.size	Size of the lable of Y-axis.
ytick.size	Size of tick lables of Y-axis.

Value

plotly_ellipse returns an npointsx2 matrix of the points forming the border of the ellipse.

References

Johnson, R. A. and Wichern, D. W. (2002) Applied Multivariate Statistical Analysis, Fifth Edition, Prentice Hall.

See Also

regcr, ellipse

Examples

## Produce a 95% ellipse with the specified mean and covariance structure.
mu <- c(1, 3)
sigma <- matrix(c(1, .3, .3, 1.5), 2, 2)
plotly_ellipse(mu, sigma, npoints = 200)

mixtools documentation built on Dec. 5, 2022, 5:23 p.m.