ENellipse: Confidence ellipses

In EnQuireR: A package dedicated to questionnaires

Description

This function allows to draw ellipses around the categories of a chosen variable.

Usage

ENellipse(matP, cluster, resampling="population", iter=500, alpha = 0.05, coord = c(1, 2), eig, cex = 1, color = NULL)

Arguments

matP	factorial coordinates from MCA
cluster	chosen categorical variable
resampling	If "population", the resampling is done within the whole dataset. If "cluster", it is done within the clusters
iter	number of iterations for the Bootstrap method, by default iter=500
alpha	the confidence level of the ellipses. By default alpha=0.05
coord	selected axes
eig	eigenvalues of the MCA
cex	graphical option: character size
color	graphical option: ellipses' colours

Details

This function can be used to draw ellipses around the centers of gravity of each cluster, when the chosen categorical variable is the variable obtained after the cluster analysis.

Author(s)

Sebastien Le [e-mail]
Jerome Bouche [e-mail]
Marine Cadoret [e-mail]
Gwenaelle Fournier [e-mail]
Olivier Fournier [e-mail]
Francois Le Poder [e-mail]

Examples

## Not run: 
data(tea)
res.enmca=ENMCA(tea[,1:18])
x<-res.enmca$MCA$ind$coord[,1:2]
b<-res.enmca$data[,ncol(res.enmca$data)]
ENellipse(matP=x, cluster=b, resampling="population", iter=500, alpha = 0.05, coord = c(1, 2), eig=res.enmca$MCA$eig, cex = 1, color = NULL)

## End(Not run)

EnQuireR documentation built on May 2, 2019, 5:24 p.m.