plotMvloc: Function to Plot Multivariate Location Estimates and Their...

In MNM: Multivariate Nonparametric Methods. An Approach Based on Spatial Signs and Ranks

Function to Plot Multivariate Location Estimates and Their Confidence Ellipsoids.

Description

Visually presents and compares different multivariate location estimates and their confidence ellipsoids.

Usage

plotMvloc(est1, est2 = NULL, est3 = NULL, X = NULL, alim = NULL, 
          color.ell = 2:4, color.points = grey(0.5), 
          lty.ell = rep(1, 3), pch.ell = rep(16, 3), 
          lwd.ell = rep(1, 3), cex.ell = rep(1, 3), 
          pch.points = 1, level = 0.95, npoints = 100, 
          x.legend, y.legend, cex.legend = 1, pty = "s", gap = 1, 
          oma.bottom, labels, cex.labels = 2, main, ...)

Arguments

est1	The location of interest. A list with the components location, vcov and est.name, for example an object of class 'mvloc'.
est2	An optional additional location estimate. A list with the components location, vcov and est.name, for example an object of class 'mvloc'.
est3	An optional additional location estimate. A list with the components location, vcov and est.name, for example an object of class 'mvloc'.
X	a numeric data frame or matrix. Optional data points on which the estimates could have been based.
alim	can be NULL, both or ellipses. Specifies whether the plotting regions are are based on the confidence ellipsoids only or also the range of the data points. If NULL it chooses both if X is provided and otherwise ellipses.
color.ell	vector of length 3 that gives the colors for the corresponding estimates 'est1', 'est2' and 'est3'.
color.points	the color of the data points.
lty.ell	line types of the confidence ellipsoids.
pch.ell	plotting symbols for the location estimates, the centers of the confidence ellipsoids.
lwd.ell	line width values of the confidence ellipsoids.
cex.ell	cex values for the location estimates, the centers of the confidence ellipsoids.
pch.points	plotting symbol for the data points X.
level	the level of the confidence ellipsoids.
npoints	the number of points used to approximate each ellipsoid.
x.legend	vertical position of the legend. By default tries to find for 2 to 4 dimensional data a good location. If NULL no legend is drawn.
y.legend	horicontal position of the legend. By default tries to find for 2 to 4 dimensional data a good location. If NULL no legend is drawn.
cex.legend	cex for the legend.
pty	pty value for the individual plots of the scatter matrix. Default is "s".
gap	distance between subplots, in margin lines.
oma.bottom	oma value of the bottom.
labels	optional labels for the diagonals.
cex.labels	cex for the labels. Default is 2.
main	optional title of the plot.
...	further arguments passed to or from other methods.

Details

The figure can be used to compare different multivariate location estimates. The location of the legend is currently problematic and it is recommended that the user should provide the coordinates for the legend.

Value

A scatterplot matrix.

Author(s)

Klaus Nordhausen

See Also

ellipse, plotShape

Examples

X <- rmvt(50, diag(c(1, 2)), 3)

est1 <- mv.1sample.est(X)
est2 <- mv.1sample.est(X, "sign")
est3 <- mv.1sample.est(X, "rank", "inner")

plotMvloc(est1)
plotMvloc(est1, est2, est3, X, alim="b", lty.ell=1:3, pch.ell=14:16)
plotMvloc(est1, est2, est3, X, alim="e")

MNM documentation built on May 29, 2024, 8:49 a.m.