What is Cluster Analysis?
Finding groups of objects:
The objects in a group will be similar (or related) to
one another.
The objects in a group will be different from (or
unrelated to) the objects in other groups.
Cluster analysis
Finding similarities between data according to the
characteristics found in the data and grouping similar
data objects into clusters
Unsupervised learning: no predefined classes
Typical applications
As a stand-alone tool to get insight into data distribution
As a preprocessing step for other algorithms