Plot of a categorical supplementary variable

Adds a categorical supplementary variable to a MCA cloud of categories.

textvarsup(resmca, var, sel = 1:nlevels(var), axes = c(1, 2), 
           col = "black", app = 0, vname = NULL)

Arguments

resmca

object of class MCA, speMCA, csMCA, stMCA or multiMCA

var

the categorical supplementary variable. It does not need to have been used at the MCA step.

sel

numeric vector of indexes of the categories of the supplementary variable to be added to the plot (by default, labels are plotted for every categories)

axes

numeric vector of length 2, specifying the dimensions (axes) to plot (default is c(1,2))

col

color for the labels of the categories (default is black)

app

numerical value. If 0 (default), only the labels are plotted and their size is constant; if 1, only the labels are plotted and their size is proportional to the weights of the categories; if 2, points (triangles) and labels are plotted, and points size is proportional to the weight of the categories.

vname

a character string to be used as a prefix for the labels of the categories (null by default)

Author

Nicolas Robette

Examples

# specific MCA of Music example data set
data(Music)
junk <- c("FrenchPop.NA", "Rap.NA", "Rock.NA", "Jazz.NA", "Classical.NA")
mca <- speMCA(Music[,1:5], excl = junk)
# cloud of categories
# with Gender and Age supplementary variables
plot(mca, col = "gray")
textvarsup(mca, Music$Gender,col = "darkred")
textvarsup(mca, Music$Age, sel = c(1,3), col = "orange",
           vname = "age", app = 1)