是否可以使用外部定义的评分函数使用网格搜索

Question

我定义了外部评分函数，以确定手写数字的群集精度，但无法弄清楚如何与GridSearchCV结合使用该函数。

s = GridSearchCV(estimator = pipe_cl, 
                 param_grid = param_distributions,
                 scoring = my_scorer,
                 n_jobs=-1)

gs.fit(X_train, y_train)

y_pred_km = gs.predict(X_test)
my_scorer = make_scorer(clustering_accuracy_score(y_test, y_pred_km))    

Answer 1

make_scorer返回一个新函数，它作为参数为参数。所以这应该有效：

my_scorer = make_scorer(clustering_accuracy_score)
gs = GridSearchCV(estimator = pipe_cl, 
                 param_grid = param_distributions,
                 scoring = my_scorer,
                 n_jobs=-1)
gs.fit(X_train, y_train)