an object of class "decorana", the result of a call to decorana.
axes
numeric; which axes to plot, given as a vector of length 2.
geom
character; which geoms to use for the layers. Can be a
vector of length equal to length(display), in which case the
ith element of type refers to the ith element
of display.
layers
character; which scores to plot as layers
legend.position
character or two-element numeric vector; where to position the legend. See theme for details. Use "none" to not draw the legend.