W2_A2_Ex-5_Dot product throws a NaN

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
1

Hi hope you can help I think I have found a bug in this question.
Calculating w.T by X as a dot product leaves me with one negative number which throws a NaN when I log it.
I am wondering if the test data is randomly generated so people cannot copy answers.
Any help is appreciated!
Thanks,
Peter

2

Hello @Peter1998,

image

There is a sigmoid function which will make sure the output is between 0 and 1. Remember we are working on the logistic regression problem and we need the sigmoid activation for it.

Cheers,
Raymond

PS: I will move you thread back to the Deep Learning Specialization Course 1 category, and please post any DLS related questions in the right category.

3

Sorry about posting in the wrong place, i’m new here!
Thank you for the answer missed the sigmoid function!

4

No problem @Peter1998 :wink: