Stuck on Week 3 practice lab: logistic regression

Course Q&A Machine Learning Specialization Supervised ML: Regression and Classification
1

I am currently enrolled in “Supervised Machine Learning: Regression and Classification” by Andrew Ng, and I am having an issue with the final lab assignment of Week 3. I am getting 0% on the lab, and it is not showing any feedback on what I got wrong. I have attached a screenshot for reference. Can anyone please help me with this?

{mentor edit: image of code removed}

2

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

I have edited your post to remove the code.

Instead, please post a screen capture image of what you see when you run that cell, or the detailed feedback from the grader, or images of any error messages.

Note: At a glance I see no issues with your sigmoid() function.

What results did you get when you ran the tests in the following two cell?

3

Hello,

Sorry about that, this was my first time posting something here. I am not sure where I can see the feedback. Can you please help with it? Also, when I am submitting it, I am getting 0% and below I see “Cell #14. Can’t compile the student’s code. Error: TypeError(“unsupported operand type(s) for +=: ‘float’ and ‘NoneType’”)”

4

That’s the grader feedback I mentioned.

The most likely issue is that you have not completed all of the assignments in the notebook yet. You cannot grade a partially completed assignment.

The error specifically says you’re trying to use the += operator to add a float with a variable that is set to “None”.

5

I have completed all 6 exercises and submitted them, but it is giving me the same error with 0%. Please help

6

Have you perhaps renamed your notebook?

7

No, I haven’t. Can I send you a screenshot of it so you can tell me if my code was wrong? But what I don’t understand is that it is not grading the other exercises and just showing the error of “Cell #14. Can’t compile the student’s code. Error: NameError(“name ‘z_wb’ is not defined”)”

8

Kindly look for usage of z_wb. It seems you are using this variable on right side of any formula or equation, before actually defining this variable name & value in your code.
Is this variable name already exist inside provided source code or you have initiated it?

9

@Sri_Sudula, please check your personal messages for instructions.

10

To close out the thread:

The lab was completed successfully by referencing the “Hint” sections of the notebook.

Tip: Familiarity with Python programming will smooth your path of learning.