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Cluster analysis or clustering is the task of grouping a set of objects in such a way that objects in the same group (called a cluster) are more similar (in some sense or another) to each other than to those in other groups (clusters).
Unsupervised Classification Unsupervised Classification (Clustering) Classification â¢ Supervised â¢ Unsupervised (clustering) â K-Means â ISODATA . A classification procedure is unsupervised if â¢ no training data are required â¢ the user only needs to specify information that does not describe individual class characteristics â number of classes â a threshold distance â â¦ Unsupervised Classification (Clustering) Clustering: Pattern Classification by Distance Functions . Premise: