C3_W1 lab assignment:Naive Bayes function grading

Course Q&A Math for Machine Learning Probability & Statistics for Machine Learning &...
1

Hi what am I missing in implementing naive_bayes function? I pass the test but I get zero in grade reason: division by zero

def naive_bayes(treated_email, word_frequency, class_frequency, 
  # mentor edit: code removed
2

Please do not post your code on the forum. That’s not allowed by the Code of Conduct.

If a mentor needs to see your code, we’ll contact you with instructions.

Hint:
p_spam and p_ham should do some math using the class_frequency - not by using prob_email…

3

thanks TMosh but my code passed the test and everything after. Why we created prob_email_given_class in first place?

4

That’s a good question. I do not have an answer.
There are many mysteries about the M4ML course design.

5

Hello @Hassan_Mohamed6

your codes are incorrect

  1. while Compute P(email | spam) with the function you defined just above, kindly mention cls=‘spam’ in the code

  2. Also to compute P(spam) and p(ham) using the class_frequency dictionary and using the formula #spam emails / #total emails, but you are not using class frequency

  3. Compute the quantity P(spam) * P(email | spam), let’s call it spam_likelihood
    while mentioning (email | spam) means email or spam but have included both.

Also I have doubt if you are working on a updated assignment notebook? as the course3 week 1 and week 4 assignments were updated. So kindly make sure you have an updated copy.

Regards
DP

6

Thanks Deepti will check and come back to you