no unnamed argument, added to force named binding of later arguments.
annot_size
numeric: scale annotation text (if present)
colorPalette
name of a Brewer palette (see https://colorbrewer2.org/ )
nclus
scalar: number of z-clusters to plot
adjust_x
numeric: adjust x density plot
adjust_y
numeric: adjust y density plot
Details
xvar and yvar are the coordinates of the points, and zvar is the
continuous conditioning variable. zvar is partitioned into nclus disjoint
ranges (by default, 3), which are then treated as discrete categories.The scatterplot and marginal density plots
are color-coded by these categories.