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The range represents the different values tested for each hyperparameter in the grid-search procedure. The step size refers to the increase between the starting and stop values.
| Parameter | Range (start, stop, step) | Default value |
|---|---|---|
| min_d f | (2,512,x2) | 20 |
| max_depth | (2,64,x2) | 4 |
| colsample_bytree | (1/3,1,+1/3) | 1 |
| n_estimators | Early stopping | - |
