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[英]Scikit-learn returning incorrect classification report and accuracy score
[英]scikit-learn get certainty of classification / score of the classifier for the chosen category
我正在做一些多类文本分类,它可以很好地满足我的需求:
classifier = Pipeline([
('vect', CountVectorizer(tokenizer=my_tokenizer, stop_words=stopWords, ngram_range=(1, 2), min_df=2)),
('tfidf', TfidfTransformer(norm='l2', use_idf=True, smooth_idf=True, sublinear_tf=False)),
('clf', MultinomialNB(alpha=0.01, fit_prior=True))])
categories = [list of my possible categories]
# Learning
news = [list of news already categorized]
news_cat = [the category of the corresponding news]
news_target_cat = numpy.searchsorted(categories, news_cat)
classifier = classifier.fit(news, news_target_cat)
# Categorizing
news = [list of news not yet categorized]
predicted = classifier.predict(news)
for i, pred_cat in enumerate(predicted):
print(news[i])
print(categories[pred_cat])
现在,我想有一个与预测类别是其从预测“确定性”(例如:0.0 - >“我已经推出一个骰子选择类别”高达1.0 - >“任何事情都不能使我改变主意约那个新闻的类别“)。 我应该如何获得该类别的确定性值/预测值得分?
如果您需要类别probability
之类的东西,则必须使用分类器的predict_proba()
方法。
文件 。
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