[image] In equation (2) [image] the gradient of Wj is the sum of the losses of all examples multipled by x[i,j] and divided by number of examples. But why in the code implementation, the looping of examples is outside looping of the features? Then it becomes update each feature’s weight by one e…

Hi @flyunicorn , The ‘Hints’ under the function definition explained clearly the code structure and what each code block does. I find it helpful for check of understanding and code logic. If you have not used it in the past, I highly recommend it. Just click on the link and it will open up a sub-wi…

Ah, I will have to remove my code then :face_with_monocle: It is the solution to the problem if I understand correctly

Hi @dtonhofer , I didn’t check your code, but just my 2 cent of my understanding of how the forums operate. Prof Ng always try to start from a simple way to illustrate the point/topic, and then gradually brings the learning content to a higher/deeper/ level, or suggests alternative methods. You c…

But if I swtich the 2 loops, is it also correct?

Hi @flyunicorn , The lab you are referring to is actually an optional lab. For the optional lab, there is not ‘hints’. But there are ‘hints’ offering assistance at various places along the graded notebook. You will see Click for hints in green colour just below the code cell of the function defi…

Hi @flyunicorn , What is your reason for switching the 2 loops?

Just wondering why one set up is chosen over the other? Can I conclude that switching the 2 loops will yield the same result?

“Switching the loops” is only rarely possible. In this case it wouldn’t even make sense to “switch the loops”. Python seems particularly bad at making code easy to read, but consider this tree of operations: [Screenshot_20250407_162926] You cannot exchange the lower and upper green boxes becaus…

Week3 lab 6

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

flyunicorn April 6, 2025, 8:43am 9

{moderator edit - solution code removed}

Where is the “Hints” you mentioned? Strange I don’t find it under the function definition.

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Week3 lab 6

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