cross_val_score does the exact same thing in all your examples. It takes the features df and target y , splits into k-folds (which is the cv ... ... <看更多>

cross_val_score : Run cross-validation for single metric evaluation. cross_val_predict : Get predictions from each split of cross-validation for. ... <看更多>

sklearn.cross_validation. cross_val_score (estimator, X, y=None, scoring=None, cv=None, n_jobs=1, verbose=0, fit_params=None, pre_dispatch='2*n_jobs')[源 ... ... <看更多>

If you're not doing hyperparameter optimization or model selection, you don't need to do both cross_val_score and train/test split. ... <看更多>

train_test_split,GridSearchCV,cross_val_score_相国大人-程序员秘密. 技术标签： MachineLearning. 一：交叉验证交叉验证示意图：将数据分为训练 ... ... <看更多>