How to access sparse matrix elements?

Question

type(A)

A.shape
(8529, 60877)
print A[0,:]
  (0, 25)   1.0
  (0, 7422) 1.0
  (0, 26062)    1.0
  (0, 31804)    1.0
  (0, 41         


        

Answer 1

If it is for calculating TFIDF score using TfidfTransformer, yu can get the IDF by tfidf.idf_. Then the sparse array name, say 'a', a.toarray().

toarray returns an ndarray; todense returns a matrix. If you want a matrix, use todense; otherwise, use toarray.