C1_W2 Linear Regression

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

I’m confused.
When I run the test code; I get an error:

NameError: name ‘x_train’ is not defined

It’s indicating this line
5 cost = compute_cost(x_train, y_train, initial_w, initial_b)

I can’t figure out how to fix it.

2

Start by running all of the cells from the top of the notebook. You have to do this every time you open the notebook.

Also, inside the compute_cost() function, the variable is x, not ‘x_train’. Variable names are local to their scope.

1 Like
3

Ah thank you so much that did it. I did not know that you had to run all the cells from top to bottom! Thank you!