| name | lemma-unsupervised |
| description | Discover or evaluate structure without labels, including clustering, anomaly detection, embeddings, dimensionality reduction, and topic models. |
Unsupervised analysis
Deliver
Provide the discovered structure or anomalies, the preprocessing and selection
choices that produced them, stability evidence, useful interpretation, and
clear limits on what the pattern means.
Check
- Define the observation unit, intended use, distance or similarity notion,
and seed.
- Inspect scaling, missingness, redundancy, outliers, and high-cardinality
features before fitting.
- Compare against a simple reference and a small motivated set of
representations or algorithms.
- Test stability across resamples, seeds, perturbations, or time windows.
- Evaluate usefulness with domain checks or downstream outcomes that were not
used to manufacture the pattern.
Do not treat an attractive projection as validation, select cluster count from
one index alone, or assign causal or essential meaning to algorithmic groups.
For stability and interpretation patterns, read
references/deep-guide.md.
