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What is Cluster Analysis?
- Cluster: A collection of data objects
- similar (or related) to one another within the same group
- dissimilar (or unrelated) to the objects in other groups
- Cluster analysis (or clustering , data segmentation, … )
- Finding similarities between data according to the characteristics found in the data and grouping similar data objects into clusters
- Unsupervised learning: no predefined classes (i.e., learning by observations vs. learning by examples: supervised)
- Typical applications
- As a stand-alone tool to get insight into data distribution
- As a preprocessing step for other algorithms
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