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Mammal's teeth divided into the 4 groups: incisors, canines, premolars and molars.
data(dentitio)
A data frame with 66 observations on the following 8 variables.
top.inc
Top incisors.
bot.inc
Bottom incisors.
top.can
Top canines.
bot.can
Bottom canines.
top.pre
Top premolars.
bot.pre
Bottom premolars.
top.mol
Top molars.
bot.mol
Bottom molars.
John A. Hartigan: Clustering Algorithms. Wiley, New York, 1975.