Exercise

Exploring text vectors, part 1

Let's expand on the text vector exploration method we just learned about, using the volunteer dataset's title tf/idf vectors. In this first part of text vector exploration, we're going to add to that function we learned about in the slides. We'll return a list of numbers with the function. In the next exercise, we'll write another function to collect the top words across all documents, extract them, and then use that list to filter down our text_tfidf vector.

Instructions

100 XP
  • Add parameters called original_vocab, for the tfidf_vec.vocabulary_, and top_n.
  • Call pd.Series() on the zipped dictionary. This will make it easier to operate on.
  • Use the .sort_values() function to sort the series and slice the index up to top_n words.
  • Call the function, setting original_vocab=tfidf_vec.vocabulary_, setting vector_index=8 to grab the 9th row, and setting top_n=3, to grab the top 3 weighted words.