C1_W3_UNQ_C6 Assertion Error

Course Q&A Machine Learning Specialization Supervised ML: Regression and Classification
1
  • Link to the classroom item you are referring to: C1_W3_UNQ_C6
  • Description: Receiving the following error:
    AssertionError Traceback (most recent call last)
    in
    11
    12 # UNIT TESTS
    —> 13 compute_gradient_reg_test(compute_gradient_reg)

~/work/public_tests.py in compute_gradient_reg_test(target)
122 dj_db, dj_dw = target(X, y, w, b, lambda_)
123
→ 124 assert np.isclose(dj_db, expected1[0]), f"Wrong dj_db. Expected: {expected1[0]} got: {dj_db}"
125 assert np.allclose(dj_dw, expected1[1]), f"Wrong dj_dw. Expected: {expected1[1]} got: {dj_dw}"
126

AssertionError: Wrong dj_db. Expected: -0.1506447567869257 got: -0.021520679540989386

I understand this means my figures are not matching. However, I’m not sure where I am going wrong. All my previous functions have passed the tests. I have read all the hints under the cell. I would like additional information in understanding this function and why my code is wrong.

2

Its probably inside the target function, especially where you compute the dj_db derivative or could even be in prior computations aiding this computation, so you have to check all that stream!

3

If all of my other tests passed prior to this function. How could any of them be incorrect?

4

Well there is some error somewhere, and the debugging starts from here…

5

The error is in your compute_gradient_reg() function.

6

I understand that much. I don’t know where I’m going wrong though. I need someone to help me understand WHERE I am going wrong. I’ve gone over the lecture videos more than once and need more guidance.

7

Everything you need to implement the code is in the notebook text. The videos can be misleading or have uncorrected errors.

8

Note that the “Click for hints” text below that function pretty much gives you the solution.

9

Sorry, but what may be easy for you to see isn’t easy for me to see. I need more help than that.

10

Have you read the hints?

11

I read the hints long before I made this post. I figured it out after some work. I think that particular question needs to be clearer. It’s misleading the way the function is structured and the way the hint is written.

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