Text Feature Extraction Hashing Trick

Reminder: bag of words

The hashing trick



In [ ]:

    
X = ["Some say the world will end in fire,",
     "Some say in ice."]



In [ ]:

    
from sklearn.feature_extraction.text import HashingVectorizer

hashing_vectorizer = HashingVectorizer()
X_hashed  = hashing_vectorizer.transform(X)



In [ ]:

    
X_hashed



In [ ]:

    
hashing_vectorizer = HashingVectorizer(ngram_range=(1, 2))
X_hashed  = hashing_vectorizer.transform(X)
X_hashed