Here we can add the points that we think is mistake or typo in the course

  1. In Vectorization video at around 2:10 in the video , clearly ‘w’ and ‘x’ are shown as column vector and then it shows that vectorized version is z =, x) + b; that I think is wrong as it will not work if w and x are column vector.

Hi @rajivkumarkale,

You are right, which is why Andrew states the w means w.T (as in, use the transpose of w) when using it in the function.