[R] Within and Between matrix

[cgenolin at u-paris10.fr]

Hi the list...

I am working on cluster analysis, more precisely on Calinski and 
Harabasz criterion
( C(g)=Trace(between)/Trace(Within)*(n-g)/(g-1)) )
Is there a package for calculating within and between matrix?
Morever, when we are using matrix with missing value, how do they 
handle it? On a more theorical point of view, how shall we do? 
Imputation will probably underestimate it, isn't it ?

Christophe



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