from mlxtend.plotting import plot_decision_regions from xgboost import XGBClassifier iris = load_iris() X, y = iris.data[:, [0, 2]], iris.target clf = XGBClassifier().fit(X, y) plot_decision_regions(X, y, clf=clf,res=0.02, legend=2) from mlxtend.plotting import plot_learning_curves from sklearn.datasets import fetch_20newsgroups from sklearn.naive_bayes import MultinomialNB from sklearn.feature_ex