R help - May 2003 - Cluster analysis, proportion of SS retained at each grouping step

Dear all,


I am doing cluster analysis using agnes() on a squared euclidean
distance matrix using Ward's method. Do you know how to get the
porportion of the initial sum of squares (when each of the n entries is
considered as a single cluster) retained at each grouping level (1
cluster, 2 clusters, 3 clusters, ... , n clusters ), i.e. an ascending
curve from 0 to 1 ?
Thanks for your help,


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Arnaud DOWKIW
Department of Primary Industries
J. Bjelke-Petersen Research Station
KINGAROY, QLD 4610
Australia
T : + 61 7 41 600 700
T : + 61 7 41 600 728 (direct)
F : + 61 7 41 600 760
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