合并两个 countvectorizers 时出现 isnan 错误

Question

我要做方言文本分类，我有这个代码：

from sklearn.naive_bayes import MultinomialNB
from sklearn.feature_extraction.text import CountVectorizer

vectorizerN = CountVectorizer(analyzer='char',ngram_range=(3,4))
XN = vectorizerN.fit_transform(X_train)

vectorizerMX = CountVectorizer(vocabulary=a['vocabs'])
MX = vectorizerMX.fit_transform(X_train)

from sklearn.pipeline import FeatureUnion
combined_features = FeatureUnion([('CountVectorizer', MX),('CountVect', XN)])
combined_features.transform(test_data)

当我运行这个代码时，我得到这个错误：

TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

我正在遵循此 post 中的代码： Merging CountVectorizer in Scikit-Learn feature extraction

还有，请问我之后如何训练和预测？

Answer 1

您应该合并 vectorizerN 和 vectorizerMX，而不是 MX 和 XN。将行更改为

combined_features = FeatureUnion([('CountVectorizer', vectorizerMX), ('CountVect', vectorizerN)])

合并两个 countvectorizers 时出现 isnan 错误

I get isnan error when I merge two countvectorizers

python

nlp

scikit-learn

text-classification

countvectorizer