C2_W3 Programming Assignment: Neural Network with Two Layers

Course Q&A Math for Machine Learning Calculus for Machine Learning and Data Science
1

All unit tests evaluated to ‘test pass’. However upon final submission it caught an anoumaly in Excercise 7:nn_model. Below is the error:

Failed test case: “extra_check”. Wrong weights matrix W1..
Expected:
[[-0.05350702 -0.10250995]
[-0.07303197 -0.1295294 ]
[-0.07487082 -0.11145172]],
but got:
[[-0.88792757 -2.15678679]
[-0.90083658 -2.29294507]
[-0.90485966 -2.2175348 ]].

Failed test case: “extra_check”. Wrong bias vector b1..
Expected:
[[0.03448384]
[0.03609865]
[0.0347455 ]],
but got:
[[0.79242606]
[0.92205182]
[0.85903016]].

Failed test case: “extra_check”. Wrong weights matrix W2..
Expected:
[[-0.39306094 -0.41154116 -0.40031599]],
but got:
[[-2.53898163 -2.75359949 -2.64586636]].

Failed test case: “extra_check”. Wrong bias vector b2..
Expected:
[[-0.74585916]],
but got:
[[1.72524631]].

Can somehelp me why this happened?

2

If you pass the local tests, but fail the grader tests, that most likely means that your code is not “general”. Something about your code is “hard-coded” to match the one particular test case.