top-n

How to see top n entries of term-document matrix after tfidf in scikit-learn Question: I am new to scikit-learn, and I was using TfidfVectorizer to find the tfidf values of terms in a set of documents. I used the following code to obtain the same. vectorizer = TfidfVectorizer(stop_words=u’english’,ngram_range=(1,5),lowercase=True) X = vectorizer.fit_transform(lectures) Now If I print …

Pandas get topmost n records within each group Question: Suppose I have pandas DataFrame like this: df = pd.DataFrame({‘id’:[1,1,1,2,2,2,2,3,4], ‘value’:[1,2,3,1,2,3,4,1,1]}) which looks like: id value 0 1 1 1 1 2 2 1 3 3 2 1 4 2 2 5 2 3 6 2 4 7 3 1 8 4 1 I want to …