Oh, I forgot something in my last posting:
Paul, where does this 'matrix methods' label come from?. It sounds a
bit derogatory - surely you don't mean it in this way? The main
conceptual apparatus of MCA was developed withouth any reference to
matrices. It took David and Christine (anybody before that?) to alert
us to the beauty of matrix algebra to represent the basics of MCA
compactly. There are other ways to use and to understand the
implications of MCA - the different graph theory methods of Asok Sen,
my control-pattern analysis. Please, don't propagate this label.
Jannie
