1. Hyperparameter
- perplexity values in the range (5 - 50) suggested
- iterate until reaching a stable configuration.
2. Cluster sizes in a t-SNE plot mean nothing
- expands dense clusters, and contracts sparse ones, evening out cluster sizes
3. Distances between clusters might not mean anything
- may not be one perplexity value that captures distances across all clusters
- perplexity is a global parameter.
4. Random noise doesn’t always look random.
- need to do in various perplexity values
5. You can see some shapes, sometimes
- need to do in various perplexity values
6. For topology, you may need more than one plot
- need to do in various perplexity values
