I want to plot biplots. I have seen the function biplot, but there are some extra features I would like, that I do not know how to achieve.
1. My observations, and my variables, fall into groups. Is there a way to, say, plot the observations in several different colours, according to which group the observation falls into? Similarly with the variables? I am used to the lattice idiom, in which one specifies groups= and panel.groups=, but biplot is not (if I understand correctly) a lattice function, and I don't know how to express what I want with the biplot command. 2. I would like to not plot arrows but instead plot axes for the variables, as suggested by Gower & Hand (1996). Or, ideally, plot axis lines which extend on either side of the origin, as far as the maximum and minimum observed value for that variable. Damon Wischik. ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
