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Recommendations from binary data

So you see from the ROEM, these models can still generate meaningful test predictions. Let's look at the actual recommendations now.

The col function from the pyspark.sql.functions class has been imported for you.

Deze oefening maakt deel uit van de cursus

Building Recommendation Engines with PySpark

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Oefeninstructies

  • The dataframe original_ratings is provided for you. It contains the original ratings that users provided. Use .filter() to examine user 26's original ratings.
  • The dataframe binary_recs is also provided. It contains the recommendations for each user. Use .filter() to examine userId == 26 recommendations. Do they seem consistent with the recommendations the model provided?
  • Do the same thing with user 99. Feel free to examine other users.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

# View user 26's original ratings
print ("User 26 Original Ratings:")
____.____(col("userId") == 26).show()

# View user 26's recommendations
print ("User 26 Recommendations:")
binary_recs.filter(col("____") == 26).show()

# View user 99's original ratings
print ("User 99 Original Ratings:")
____.filter(____("userId") == 99).show()

# View user 99's recommendations
print ("User 99 Recommendations:")
binary_recs.filter(col("userId") == ____).show()
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