C1W3 - failing tests but passing grader

Course Q&A Math for Machine Learning Linear Algebra for Machine Learning and Data Sc...
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Programming Assignment: Linear Transformations and Neural Networks

I have an issue with the exercises as the unit tests keep failing but the grader evalutes the exercise as successful.

Example is the 1st exercise of T_stretch. The code looks good to me, the unit test is however failing but the grader marks it with full 20points.

The problem I’m having is that it’s difficult to implement the other exercises because they are more difficult and without having the unit tests as a guidance or my “cost function” it’s just painful.

Can anyone advise me how to proceed?

exercise
exercise1334×383 35.7 KB

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I recommend you not use the grader until your code passes all of the notebook tests. The grader can be easily confused by portions of the notebook that haven’t been completed. I would not trust its results until you pass all of the notebook’s tests.

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