Forward prop in a single layer: W2_1 Array

Hello All,

I am new to ML and learning from scratch. I have a question on Neural Network Implementation in Python video: Forward prop in a single layer. Why is the input value of w2_1 taken as an array such as ([1,2]) and value of b1_1 as [-1]. Aren’t these scaler values?

Any help is appreciated.


Yes, you’re correct. There are multiple errors in the notations in this lecture, but they have not all been fixed.