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Matrix multiplication part II

Let's put your matrix multiplication skills to the test.

This exercise is part of the course

Building Recommendation Engines with PySpark

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Exercise instructions

  • Use the .shape attribute to understand the dimensions of matrices C and D, and determine whether these two matrices can be multiplied together or not.
  • If they can be multiplied, use the np.matmul() method to multiply them. If not, set C_times_D to None.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Print the dimensions of C
print(____.____)

# Print the dimensions of D
print(____.____)

# Can C and D be multiplied together?
C_times_D = ____
Edit and Run Code