c621775f34
* Replace all uses of deprecated function sklearn.datasets.load_boston * More renaming * Fix bad name * Update assertion * Fix n boosted rounds. * Avoid over regularization. * Rebase. * Avoid over regularization. * Whac-a-mole Co-authored-by: fis <jm.yuan@outlook.com>
20 lines
672 B
Python
20 lines
672 B
Python
"""
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Demo for using xgboost with sklearn
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===================================
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"""
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from sklearn.model_selection import GridSearchCV
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from sklearn.datasets import fetch_california_housing
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import xgboost as xgb
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import multiprocessing
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if __name__ == "__main__":
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print("Parallel Parameter optimization")
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X, y = fetch_california_housing(return_X_y=True)
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xgb_model = xgb.XGBRegressor(n_jobs=multiprocessing.cpu_count() // 2)
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clf = GridSearchCV(xgb_model, {'max_depth': [2, 4, 6],
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'n_estimators': [50, 100, 200]}, verbose=1,
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n_jobs=2)
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clf.fit(X, y)
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print(clf.best_score_)
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print(clf.best_params_)
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