Many partitional clustering algorithms that automatically determine the number of clusters claim that this is an advantage. List two situations in which this is not the case.

Question

What will be an ideal response?

Answer 1

(a) When there is hierarchical structure in the data. Most algorithms that
automatically determine the number of clusters are partitional, and
thus, ignore the possibility of subclusters.
(b) When clustering for utility. If a certain reduction in data size is needed,
then it is necessary to specify how many clusters (cluster centroids) are
produced.