Quiz: Tokens, N-Grams, tf-idf, and Stemming
Test your knowledge of document search strategies, tokenization, n-grams, stemming, and tf-idf.
We'll cover the following...
We'll cover the following...
Natural Language Tools
1.
What is the role of stopwords when combined with weighting = weightTfIdf?
A.
Creating a document-term matrix with tm calculates tf-idf as a default regardless of stopword removal.
B.
The stopword removal makes tf-idf unnecessary.
C.
tf*idf makes stop word removal unnecessary.
D.
The tm package automatically defines stopwords = true anytime weighting = weightTfIdf.
1 / 4
...