是否可以将网格搜索与外部定义的评分函数一起使用？

Question

我定义了一个外部评分函数来确定手写数字的聚类准确性，但无法弄清楚如何将该函数与 GridSearchCV 结合使用。

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 returns 一个新函数，它接受一个函数作为参数。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)