plotellipses {FactoMineR} | R Documentation |
Draw confidence ellipses around the categories.
plotellipses(model, keepvar = "all", axis = c(1, 2), means=TRUE, level = 0.95, magnify = 2, cex = 0.5, pch = 20, pch.means=15, type = c("g","p"), keepnames = TRUE, namescat = NULL, ...)
model |
an object of class MCA |
keepvar |
a boolean or numeric vector of indexes of variables or a character vector of names of variables. If keepvar is "all", "quanti" or "quanti.sup" variables which are plotted are all the qualitative variables, only those which are used to compute the MCA (active variables) or only the supplementary qualitative variables. If keepvar is a numeric vector of indexes or a character vector of names of variables, only relevant variables are plotted. |
axis |
a length 2 vector specifying the components to plot |
means |
boolean which indicates if the confidence ellipses are for (the coordinates of) the means of the categories (the empirical variance is divided by the number of observations) or for (the coordinates of) the observations of the categories |
level |
the confidence level for the ellipses |
magnify |
numeric which control how the level names are magnified. A value of 2 means that the level names have character expansion equal to two times cex |
cex |
cf. function par in the graphics package |
pch |
plotting character for coordinates, cf. function par in the graphics package |
pch.means |
plotting character for means, cf. function par in the graphics package |
type |
cf. function xyplot in the lattice package |
keepnames |
a boolean or numeric vector of indexes of variables or a character vector of names of variables. If keepnames is TRUE, names of levels are taken from the (modified) dataset extracted from modele, if FALSE trimming names is done. When trimming, names of levels are taken from the (modified) dataset extracted from modele, then, the corresponding number of characters of names of original variables plus 1 is removed. If keepnames is a vector of indexes or names, trimming is done on all variables excepted whose in keepnames |
namescat |
a vector giving for each observation the value of qualitative variable, each variable are stacked under each other. If NULL, names are taken from the (modified) dataset extracted from modele |
... |
further arguments passed to or from other methods |
Return a graph with the ellipses.
Pierre-Andre Cornillon, Francois Husson Francois.Husson@agrocampus-ouest.fr
## Not run: data(poison) res.mca = MCA(poison, quali.sup = 3:4, quanti.sup = 1:2) plotellipses(res.mca,c(1,2)) plotellipses(res.mca,c(1,2),keepvar=1:4) ## End(Not run) data(decathlon) res.pca <- PCA(decathlon, quanti.sup = 11:12, quali.sup=13) plotellipses(res.pca,keepvar=13)