Makes a nice BiPlot

Creates a custom BiPlot for visualizing the results of PCA

myBiplot(pc, colorfactor, scaling = 100, nudge = 1.2, N = 10,
  dims = 1:2, ...)

Arguments

pc	output of prcomp
colorfactor	a factor the same length as nrow(pc$x) to color the points
scaling	integer to scale the vectors showing loadings
nudge	numeric to offset labels for loadings
N	number of variables with longest dim[1] or dim[2] projections to display
dims	numeric vector of length 2 indicating which PCs to plot
...	passed to plot

Value

printed plot