如何列出测试集中预测错误的行?

Question

我们使用这样的代码来衡量准确性，但我想检查哪些行预测是错误的。我怎么能做这样的事情？

text_mnb_lemmatized = Pipeline([('vect', lemma_count_vect), 
('tfidf', TfidfTransformer(sublinear_tf=True, use_idf=False)), 
('mnb', MultinomialNB(alpha=0.1, fit_prior=True))])
text_mnb_lemmatized = text_mnb_lemmatized.fit(train_data['CDESCR'], train_data['COMPID'])
predicted_mnb_lemmatized = text_mnb_lemmatized.predict(test_data['CDESCR'])
np.mean(predicted_mnb_lemmatized == test_data['COMPID'])

Answer 1

假设test_data是一个Pandas DataFrame：

test_data[predicted_mnb_lemmatized != test_data['COMPID']]