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Clusters with a predetermined order from top to bottom are created using hierarchical clustering. All files and folders on the hard disc, for example, are arranged in a hierarchy. Divisive and Agglomerative hierarchical clustering are the two types of hierarchical clustering.

Hierarchical clustering is a useful approach for creating tree structures out of data similarities. You can now see how distinct sub-clusters are related to one another, as well as the distance between data points.

Hierarchical clustering, also known as hierarchical cluster analysis, is a method of grouping related objects into clusters. The endpoint is a collection of clusters, each of which is distinct from the others yet the items within each cluster are broadly similar.

A hierarchical clustering is a tree-like arrangement of nested clusters. When the cluster structure is hyper spherical, K Means clustering is found to perform well (like circle in 2D, sphere in 3D). When the shape of the clusters is hyper spherical, hierarchical clustering does not operate as well as, k means.

Hierarchical clustering can be divided into two types: divisive (top-down) and agglomerative (bottom-up) (bottom-up).

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