WEEK 2 LAB ,I GOT THIS ERROR ... cost must be 2 but got 0

Course Q&A Machine Learning Specialization Supervised ML: Regression and Classification
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Continuing the discussion from Error in week 2 lab assigment:

Screenshot 2023-01-03 175844
Screenshot 2023-01-03 175844829×735 90.9 KB

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Hey @KAILASHPATI,
Welcome to the community. The error message clearly indicates that your implementation of compute_cost is erroneous. Have you taken the square of the error, before averaging the errors to get the total cost?

Cheers,
Elemento

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Hi @KAILASHPATI

In addition to what Elemento said the code is do a loop over the training set do you have(m) in every iteration you compute the prediction = wx[…]+b after that you subtract the prediction minus the real value and compute the square of the result and doing summation finally before the return you divide the summation value over 2 training set do you have(m) .

also you can implement the code without the loop but by doing the vector multiplication.

you can check the hint below

Cheers!
Abdelrahman