Hyperparameter Optimization for Unsupervised Models.

Updated May 5, 2026

Short answer

Uses internal validity indexes since labels are missing[cite: 1].

Deep explanation

Techniques like Silhouette score, Calinski-Harabasz index, or using a 'Silver Standard' set of labels to tune the 'contamination' or 'n_neighbors' parameters[cite: 1].

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