勾配ブースティング

from sklearn.ensemble import GradientBoostingRegressor
from sklearn.ensemble import GradientBoostingClassifier
from sklearn.metrics import r2_score、roc_auc_score,confusion_matrix
from sklearn.metrics import 
from sklearn.model_selection import train_test_split

X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2)
clf = GradientBoostingClassifier(n_estimators=100)
clf.fit(X_train, y_train)