Biplot of Constrained Regression Models
biplot-methods.Rdbiplot is a generic function applied to RR-VGLMs and
QRR-VGLMs etc. These apply to rank-1 and rank-2 models of
these only. For RR-VGLMs these plot the second latent variable
scores against the first latent variable scores.
Note
See lvplot which is very much related to biplots.