[R] Appropriate measure of correlation with'zero-inflated' data?

Douglas Bates bates at stat.wisc.edu
Tue Oct 30 02:40:01 CET 2007

I have created some slides on the Bowl Championship series data for my
class.  Copies of just that part are available in

Two interesting things about the analysis are that a parallel
coordinate plot shows the differences in agreement quite clearly and
that axes on the biplot from a principal components analysis are
readily interpretable.

It's a great example for those teaching multivariate analysis.

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