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clearly defined clusters, different variances
data("Hepta")
Size 212, Dimensions 3, stored in Hepta$Data
Hepta$Data
Classes 7, stored in Hepta$Cls
Hepta$Cls
Ultsch, A.: Clustering with SOM: U*C, In Proc. Workshop on Self-Organizing Maps, Paris, France, (2005) , pp. 75-82
# NOT RUN { data(Hepta) str(Hepta) # }
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