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Hyperparameter settings of LightGBM used for the Bayesian optimization.
| Parameters | Search space |
|---|---|
| learning_rate | (1e-8, 1.0,'log-uniform') |
| lambda_l1 | (1e-8, 1.0,'log-uniform') |
| lambda_l2 | (1e-6, 1.0,'log-uniform') |
| bagging_fraction | (0.3, 1.0,'uniform') |
| feature_fraction | (0.3, 1.0,'uniform') |
| bagging_freq | (2, 10,'int') |
| min_child_samples | (1, 50,'int') |
| max_depth | (2, 20,'int') |
| num_leaves | (2, 1024,'int’, step = 2) |
| n_estimators | (100, 4000,'int’, step = 5) |
