Cluster analysis is the process of grouping objects together in a way that objects in one group are more similar than objects in other groups.
For example, identifying and grouping clients with similar booking activities on travel portal, as shown in the following figure.
In the preceding example, each group is called a cluster, and each member (data point) of the cluster behaves similar to its group members:
Cluster analysis is an unsupervised learning method. In supervised methods such as regression analysis, we have input variables and response variables; we fit a statistical model to the input variables to predict the response ...