Simple and enhanced plot of MCA solutions

This function is intended as an alternative to plot.mjca for plotting multiple correspondence analysis solutions. It provides more flexibility for labeling factor levels and connecting them with lines. It does not support some features of plot.mjca (centroids, supplementary points, arrows, etc.)

Usage

mcaplot(obj, 
  map = "symmetric", 
  dim = 1:2, 
  col = c("blue", "red", "brown", "black", "green3", "purple"), 
  pch = 15:20, 
  cex = 1.2, 
  pos = 3, 
  lines = TRUE, 
  lwd = 2, 
  legend = FALSE, 
  legend.pos = "topright", 
  xlab = "_auto_", 
  ylab = "_auto_", 
  rev.axes  = c(FALSE, FALSE),
  ...)

Arguments

obj

An "mjca" object

map

Character string specifying the map type, i.e., the scaling applied to coordinates for different types of MCA representations. Allowed options include: "symmetric" (default), "rowprincipal", "colprincipal", "symbiplot", "rowgab", "colgab", "rowgreen", "colgreen". See mjca for details.

dim

Dimensions to plot, an integer vector of length 2

col

Vector of colors, one for each factor in the MCA

pch

Vector of point symbols for the category levels, one for each factor

cex

Character size for points and level labels

pos

Position of level labels relative to the category points; either a single number or a vector of length equal to the number of category points.

lines

A logical or an integer vector indicating which factors are to be joined with lines using multilines

lwd

Line width(s) for the lines

legend

Logical; draw a legend for the factor names?

legend.pos

Position of the legend in the plot, as in legend

xlab,ylab

Labels for horizontal and vertical axes. The default, "_auto_" means that the function auto-generates a label of the form "Dimension X (xx.x %)"

rev.axes

A logical vector of length 2, where TRUE reverses the direction of the corresponding axis

...

Arguments passed down to plot

Value

Returns the coordinates of the category points invisibly

Author

Michael Friendly

See also

mjca, plot.mjca

cacoord returns CA and MCA coordinates, multilines draw multiple lines according to a factor,

Examples

require(ca)
data(Titanic)
titanic.mca <- mjca(Titanic)
#> Warning: 'as.is' should be specified by the caller; using TRUE
#> Warning: 'as.is' should be specified by the caller; using TRUE
#> Warning: 'as.is' should be specified by the caller; using TRUE
#> Warning: 'as.is' should be specified by the caller; using TRUE
mcaplot(titanic.mca, legend=TRUE, legend.pos="topleft")


data(HairEyeColor)
haireye.mca <- mjca(HairEyeColor)
#> Warning: 'as.is' should be specified by the caller; using TRUE
#> Warning: 'as.is' should be specified by the caller; using TRUE
#> Warning: 'as.is' should be specified by the caller; using TRUE
mcaplot(haireye.mca, legend=TRUE, cex.lab=1.3)