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Table 3.
Hyperparameters we explored for each algorithm.
| Hyperparameters | Tested values | Best value |
|---|---|---|
| Affinity propagation | ||
| affinity | euclidean | euclidean |
| convergence_iter | 20 | 20 |
| damping | [0.5, 0.51,..., 0.99] | 0.5 |
| max_iter | 200 | 200 |
| Agglomerative clustering | ||
| affinity | [manhattan, cosine, | |
| euclidean] | manhattan | |
| compute_full_tree | [False, True] | False |
| linkage | [complete, average] | complete |
| n_clusters | [9, 10,..., 26] | 26 |
| Bayesian Gaussian mixture | ||
| covariance_type | [tied, diag] | diag |
| init_params | [kmeans, random] | kmeans |
| n_components | [9, 10,..., 26] | 20 |
| n_init | 5 | 5 |
| random_state ( † ) | [31, 43,..., 473] | 283 |
| warm_start | [False, True] | False |
| DBSCAN | ||
| algorithm | [ball_tree, kd_tree, | |
| brute] | ball_tree | |
| eps | [0.3, 0.31,..., 1.49] | 0.58 |
| leaf_size | 10 | 10 |
| metric | euclidean | euclidean |
| min_samples | [2, 3] | 2 |
| Gaussian mixture | ||
| covariance_type | [spherical, diag] | spherical |
| init_params | [k-means, random] | k-means |
| max_iter | 1000 | 1000 |
| n_components | [2, 3,..., 26] | 20 |
| random_state† | [31, 43,..., 473] | 283 |
| K-means | ||
| init | [k-means++, random] | random |
| n_clusters | [9, 10,..., 26] | 26 |
| n_init | 5 | 5 |
| random_state ( † ) | [31, 43,..., 473] | 43 |
| Mini-batch K-means | ||
| batch_size | [10, 20,..., 100] | 90 |
| init | [k-means++, random] | random |
| n_clusters | [9, 10,..., 26] | 25 |
| random_state ( † ) | [31, 43,..., 473] | 31 |
| reassignment_ratio | [0.1, 0.01, 0.001] | 0.1 |
| Spectral clustering | ||
| affinity | [rbf, sigmoid, | |
| polynomial, poly] | rbf | |
| assign_labels | [kmeans, discretize] | discretize |
| degree | [3, 4, 5] | 3 |
| n_clusters | [9, 10,..., 26] | 17 |
| n_neighbors | [2, 5, 10] | 2 |
| random_state ( † ) | [31, 43,..., 473] | 383 |
Notes. The last column shows the value of the parameter in the run with the highest homogeneity score.
( † )We have tried ten different random seeds, 31, 43, 98, 196, 283, 294, 374, 383, 433 and 473.
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