• In-class form
• Have project prototypes ready for Wednesday.
• Why clustering? Vin Diesel movies.
• Another view of k-means equilibria.

• Can we use interaction and visualization to demonstrate an algorithm?
• True distributions and model distributions.
• Can we find groups of data points automatically?
• Is this hard? Clustering and variability.
• How do we know if we've done a good job?

Assign Points Update Centroids